Phosphoproteomic change resulting from nocodazole treatment varie

Phosphoproteomic change resulting from nocodazole treatment varied among cell lines in terms of the numbers of total phosphopeptides identified, motif groups, and functional annotation groups; however,

the cell lines were equally sensitive to nocodazole. The identified phosphoproteome subset contained major signaling proteins and proteins known to be involved in mitosis, but did not always exhibit the same changes in the tumor cells from nocodazole treatment. In spite of the complex changes observed in the phosphorylation of many of the proteins, possible common features induced by nocodazole were found, including QNZ purchase phosphorylation of nucleophosmin (NPM) S254 and coatomer protein complex, subunit alpha (COPA) S173, suggesting that

the events are not cell-type specific but events generally occurring in mitosis or induced by a microtubule-interfering agent. Further, temporal analysis of phosphoproteome change revealed that phosphorylation of NPM S254 and COPA S173 was observed from the early (6 h) and late (24 h) time point after nocodazole treatment, respectively, suggesting that NPM S254 may be involved in the induction of M-phase arrest by nocodazole, whereas COPA S173 may be caused as a result of M-phase arrest.”
“In the age of genomic medicine we can often now do the genetic testing that will permit more accurate personal tailoring of medications to obtain the best therapeutic results. This is certainly a medically and morally desirable result. However, in other areas of medicine pharmacogenomics is generating

click here consequences that are much less ethically benign and much less amenable to a satisfactory ethical resolution. More specifically, we will often find ourselves left with ‘wicked problems,’ ‘ragged edges,’ and well-disguised PRKACG ethical precipices. This will be especially true with regard to these extraordinarily expensive cancer drugs that generally yield only extra weeks or extra months of life. Our key ethical question is this: Does every individual faced with cancer have a just claim to receive treatment with one of more of these targeted cancer therapies at social expense? If any of these drugs literally made the difference between an unlimited life expectancy (a cure) and a premature death, that would be a powerful moral consideration in favor of saying that such individuals had a strong just claim to that drug. However, what we are beginning to discover is that different individuals with different genotypes respond more or less positively to these targeted drugs with some in a cohort gaining a couple extra years of life while others gain only extra weeks or months. Should only the strongest responders have a just claim to these drugs at social expense when there is no bright line that separates strong responders from modest responders from marginal responders? This is the key ethical issue we address.

This

concerns the frontal lobe mainly however: commissura

This

concerns the frontal lobe mainly however: commissural fibers from the temporo-occipital neocortex still use the anterior commissure to cross, and the posterior occipito-parietal fibers use the hippocampal commissure, forming the splenium in the process. The anterior callosum and the splenium fuse secondarily to form the complete commissural plate. Given the complexity of the processes involved, commissural ageneses are many and usually associated with other diverse defects. They may be due to a failure of the white matter to develop or to the commissural neurons to form or to migrate, to a global failure of the midline crossing processes or to a selective failure of commissuration affecting specific commissural sites (anterior or hippocampal commissures, anterior callosum), or specific sets of commissural LXH254 in vivo axons (paleocortical, hippocampal, neocortical commissural axons). Severe hemispheric dysplasia may prevent the axons from reaching the midline on one or both sides. Besides the intrinsically neural defects, midline meningeal factors may prevent the commissuration

as well (interhemispheric cysts or lipoma). As a consequence, commissural agenesis is a malformative feature, not a malformation by itself. Good knowledge of the modern embryological data may allow for a good understanding of a specific pattern in a given individual patient, paving the way for RAD001 in vivo better clinical correlation

and genetic counseling.”
“Eothenomys miletus is ail important species inhabiting Hengduan Mountains region. In order to study adaptive strategy and the role Astemizole of serum leptin level in response to a 49 d cold exposure, body mass, energy intake, basal metabolic rate (BMR), nonshivering thermogenesis (NST) in E. miletus were measured. During cold exposure (5 +/- 1 degrees C), body mass decreased: serum leptin levels decreased significantly and were positively correlated with body mass and fat mass; energy intake, BMR and NST were higher at 5 degrees C than that of controls. These results suggest that E. miletus enhanced themiogenic capacity and increased maintenance cost during cold acclimation, resulting in increased energy intake. Serum leptin participated in the regulation of energy balance and body mass in E. miletus. (C) 2009 Elsevier Ltd. All rights reserved.”
“Polymicrogyria is one of the most common malformations of cortical development. It has been known for many years and its clinical and MRI manifestations are well described. Recent advances in imaging, however, have revealed that polymicrogyria has many different appearances on MR imaging, suggesting that is may be a more heterogeneous malformation than previously suspected. The clinical and imaging heterogeneity of polymicrogyria is explored in this review.

Predictors of a procedure included an index prescription in 1999

Predictors of a procedure included an index prescription in 1999 or later, a urologist visit MAPK inhibitor and nonadherence

to any benign prostatic hyperplasia medication (p = 0.01, <0.0001 and <0.0001, respectively).

Conclusions: Adherence to alpha-blockers was less than adherence to finasteride or multiple medications and nonadherence was significantly associated with a procedure. Interventions focused on improving adherence to benign prostatic hyperplasia medications are clearly needed.”
“Prenatal cocaine exposure (PCE) may be associated with alterations in children’s developing emotional arousal and regulation systems.

Objective: We examined emotional responses to a frustrating task and subsequent behavior problems in 225 2 1/2 year olds (129 Prenatally Cocaine and Other Drug Exposed [PCE], 30 Non Cocaine but other drug Exposed [NCE], 66 Non Drug Exposed [NDE]).

Method: Children’s behaviors in a frustrating toy wait task at age 2 1/2 were coded for emotional arousal and regulation behaviors.

Results: Findings indicated a trend for PCE toddlers to show greater agitated emotional arousal than NCE and NDE toddlers. Further, PCE boys made more references to their caregivers in the task than NDE boys. Higher agitated arousal

at age 2 1/2 years was related to greater decreases in externalizing behaviors through age 5 1/2 years.

Conclusion: Findings suggest a link between cocaine exposure and emotional arousal and regulation and highlight the need to understand complex relations between emotion and risk for later psychopathology in exposed youth. (C) 3-mercaptopyruvate sulfurtransferase ZD1839 molecular weight 2009 Elsevier Inc. All rights reserved.”
“Purpose: We examined sexual function in overweight and obese women with urinary incontinence, and evaluated the effects of an intensive behavioral weight reduction intervention on sexual function in this population.

Materials and Methods: A total of 338 overweight and obese women reporting 10 or more incontinence episodes weekly were randomized to an intensive behavioral change (226) or structured education program (112) for 6 months. Sexual function was assessed using self-administered

questionnaires. Multivariate regression was used to examine factors associated with baseline and 6-month change in sexual function as well as intervention effects.

Results: Two-thirds of participants (233) were sexually active at baseline but more than half (188) reported low desire and a quarter (91) were sexually dissatisfied. More than half of sexually active participants (123) reported problems with arousal, lubrication, orgasm or incontinence during sex. Compared to controls women in the intervention group demonstrated a borderline increase in frequency of sexual activity at 6 months (OR 1.34, 95% CI 0.99-1.81, p = 0.06) but no differences in satisfaction (OR 1.28, 95% CI 0.83-1.99, p = 0.26), desire (OR 1.12, 95% CI 0.79-1.61, p = 0.52) or problems (beta +/- SE 0.03 +/- 0.07, p = 0.68 for intervention effects on problems score).

Results Serum testosterone increased from 11 6 +/- 3 5 to 18 0 +

Results. Serum testosterone increased from 11.6 +/- 3.5 to 18.0 +/- 8.1 nmol/L by 10 days after randomization in the active group (but not the placebo group) and was maintained throughout the treatment Combretastatin A4 price period. Testosterone treatment resulted in a preservation of muscle

thickness at 6 months while it decreased in the placebo group (effect size 1.4 [95% confidence interval = 0.3-2.5; p=.015]). There was no significant effect of treatment on fascicle length (effect size 1.9 mm [95% confidence interval = -1.2 to 5.0 mm; p=.22]) or pennation angle (effect size 1.2 [95% confidence interval = -1.3 to 3.7; p=.32]).

Conclusions. Testosterone replacement in intermediate-frail and frail elderly men is associated with preservation of muscle thickness. The results suggest that testosterone mitigates sarcopenia by improving muscle tissue to maintain a state of normality in aging men.”
“We examined the association between extremely low-frequency magnetic fields (EMF) and the risk of dementia and Alzheimer’s disease using all 9,508 individuals from the Study of Dementia in Swedish Twins (HARMONY) with valid occupational and diagnostic data.

Dementia diagnoses were based on telephone screening followed by in-person clinical workup. Main lifetime occupation was coded according to an established EMF exposure

matrix. Covariates were age, gender, STAT inhibitor education, vascular risk factors, and complexity of work. Based on previous research, data were also analyzed separately for cases with disease onset by age 75 years versus later, men versus women,

and those with manual versus nonmanual main occupation. We used generalized estimating equations with the entire sample (to adjust for the inclusion of complete twin pairs) Immune system and conditional logistic regression with complete twin pairs only.

Level of EMF exposure was not significantly associated with dementia or Alzheimer’s disease. However, in stratified analyses, medium and high levels of EMF exposure were associated with increased dementia risk compared with low level in cases with onset by age 75 years (odds ratio: 1.94, 95% confidence interval: 1.07-3.65 for medium, odds ratio: 2.01, 95% confidence interval: 1.10-3.65 for high) and in participants with manual occupations (odds ratio: 1.81, 95% confidence interval: 1.06-3.09 for medium, odds ratio: 1.75, 95% confidence interval: 1.00-3.05 for high). Results with 42 twin pairs discordant for dementia did not reach statistical significance.

Occupational EMF exposure appears relevant primarily to dementia with an earlier onset and among former manual workers.”
“Because cognitive impairment and frailty share common risk factors (eg, high proinflammatory cytokines), we examined whether poor cognition predicts subsequent risk of frailty in initially nonfrail Mexican Americans aged 67 years and older.

Thus the need for global optimization methods is more highlighted

Thus the need for global optimization methods is more highlighted. MLN8237 in vitro The proposed method in this paper is a Chaotic Optimization Algorithm (COA) proceeding by the common Error Back Propagation (EBP) local method. Since the model has many parameters,

we use a strategy to reduce the dependency among parameters caused by the chaotic series generator. This dependency was not considered in the previous COA methods. The algorithm is compared with logistic regression model as the latest successful methods of ESCC and dysplasia prediction. The results represent a more precise prediction with less mean and variance of error. (C) 2012 Elsevier Ltd. All rights reserved.”
“A previous study suggests that the amplitude of the N400 event-related potentials (ERPs) of healthy subjects does not vary with their

delusional-like ideations. This contrasts with the smaller N400 amplitudes observed in more- than in less-deluded schizophrenia patients. Here, we hypothesize that these smaller N400 amplitudes were related to the paranoid feelings patients had during the ERP recording. We thus induced this type of feelings in healthy subjects. Delusional-like ideation was assessed with the schizotypal personality questionnaire. Thirty-four healthy subjects completed a semantic categorization task. Paranoid feelings were significantly enhanced by the induction. In these conditions, greater delusional-like ideation scores were associated with smaller N400 amplitudes and larger late positive components. Controlling for the two other schizotypal https://www.selleckchem.com/products/oicr-9429.html factors strengthened these results. These findings may help us understand why delusions persist.”
“A new computational model based on an optimal power, wake-only aerodynamics method is presented to predict the interdependency of energetics and kinematics in bird and bat flight. The model is divided into offline, intermediate and online modules. In the offline module, a four-dimensional design space sweep is performed

(lift, thrust, Urease flapping amplitude and flapping frequency). In the intermediate stage, the physical characteristics of the animal are introduced (wing span, mass, wing area, aspect ratio, etc.), and a series of amplitude-frequency response surfaces are constructed for all viable flight speeds. In the online component, the amplitude-frequency response surfaces are mined for the specific flapping motions being considered.

The method is applied to several biological examples including a medium sized fruit bat (Cynopterus brachyotis), and two birds: a thrush nightingale (Luscinia luscinia) and a budgerigar (Melopsittacus undulatus). For each of these animals, the power and kinematics predictions are compared with available experimental data. These examples demonstrate that this new method can reasonably predict animal flight energetics and kinematics. (C) 2012 Elsevier Ltd. All rights reserved.

Study end points were graft patency and the occurrence of severe

Study end points were graft patency and the occurrence of severe peripheral arterial ischemia, and the incidence of bleeding episodes.

Results: Follow-up ranged Quisinostat cost from 4 to 9 years. The graft patency rate and the freedom from severe peripheral arterial ischemia was significantly higher in C + OAT group than in C + ASA group (P = .026 and .044, respectively, Cox-Mantel test). The linearized incidence of minor bleeding complications was significantly higher in C + OAT group than in C + ASA group (2.85% patient-years vs 1.37% patient-years; P = .03). The incidence of major adverse cardiovascular events, including mortality, was found to be similar (P = .34) for both study

groups.

Conclusions: In patients who have undergone femoropopliteal vascular surgery, combination therapy with clopidogrel plus warfarin is more effective than dual antiplatelet therapy in increasing graft

patency and in reducing severe peripheral ischemia. These improvements are obtained at the expenses of an increase in the rate of minor anticoagulation-related complications. (J Vasc Surg 2012;56:96-105.)”
“Oxidation of methionine residues in biopharmaceuticals is a common and often unwanted modification that frequently occurs during their manufacture and storage. It often results in a lack of stability and biological EPZ-6438 in vitro function of the product, necessitating continuous testing for the modification throughout the product shelf life. A major class of biopharmaceutical products are monoclonal antibodies (mAbs), however, techniques for their detailed structural analysis Lepirudin have until recently been limited. Hydrogen/deuterium exchange mass spectrometry (HXMS) has recently been successfully applied to the analysis of mAbs. Here we used HXMS to identify and localise the structural changes that occurred in a mAb (IgG1) after accelerated oxidative stress. Structural alterations in a number of segments of the Fc region were observed and these related to oxidation of methionine residues. These included a large change in the hydrogen exchange profile of residues 247-253 of the heavy chain, while smaller

changes in hydrogen exchange profile were identified for peptides that contained residues in the interface of the C(H)2 and C(H)3 domains.”
“The firing rate of substantia nigra reticulata (SNr) neurons is modulated by GABA release from striatonigral and pallidonigral projections. This release is, in turn, modulated by dopamine acting on dopamine D1 receptors at striatonigral terminals and D4 receptors at pallidonigral terminals. In addition, striatal neurons that express D1 receptors also express D3 receptors. In this study we analyzed the possible significance of D3 and D1 receptor colocalization in striatonigral projections. We found that these receptors coprecipitate in SNr synaptosomes suggesting their close association in this structure.

Less is known about the association between childhood maltreatmen

Less is known about the association between childhood maltreatment and AAD among males, and the mechanisms that underlie this association in either gender. One explanation is that childhood maltreatment increases risk for AAD. An alternative explanation is that the same genetic or environmental

factors that increase a child’s risk for being maltreated also contribute to risk for AAD in adulthood.

Method. Lifetime diagnosis of AAD was assessed using structured clinical interviews in a sample of 3527 male participants aged 19-56 years from the Virginia Adult Twin Study of Psychiatric and Substance Use Disorders. The sources of childhood maltreatment-AAD association were estimated using both a matched case-control analysis BAY 11-7082 datasheet of twin pairs discordant for childhood maltreatment and bivariate twin modeling.

Results. Approximately 9% of participants reported childhood maltreatment, defined as serious neglect, molestation, or physical abuse occurring before the age of 15 years. Those who experienced childhood maltreatment were 1.74 times as likely to meet AAD criteria compared with males who did not experience childhood maltreatment. The childhood maltreatment-AAD association largely reflected environmental factors

in common to members of twin pairs. Additional exploratory analyses provided evidence that AAD risk associated with childhood maltreatment was significantly attenuated after adjusting for measured family-level risk factors.

Conclusions. Males who experienced childhood maltreatment had an increased risk for AAD. Our results suggest that the childhood maltreatment-AAD buy AZD8931 association is attributable to broader environmental adversity shared between twins.”
“Trace metal Cepharanthine (TM) pollution of soil is a worldwide

problem that threatens the quality of human and environmental health. Phytoremediation using plants and their associated microbes has been increasingly used as a green technology for cleaning up TM-polluted soils. In this study, we investigated the effect of inoculating two arbuscular mycorrhizal fungal isolates, Rhizophagus irregularis and Funneliformis mosseae, on trace metal uptake by sunflower plants grown in soils contaminated with three different Cd concentrations in a greenhouse trial. Root colonization, plant dry mass, and plant tissue cadmium (Cd), zinc (Zn), and copper (Cu) concentrations in roots and shoots were determined after sunflower harvesting. We found that root mycorrhizal colonization rates were not significantly affected by Cd treatments. At low soil Cd concentration, R. irregularis-inoculated plants had significantly higher shoot Cd and Zn concentrations than plants inoculated with F. mosseae and non-inoculated plants. However, at high soil Cd concentrations, F. mosseae-inoculated plants had significantly lower shoot Cd and Zn concentrations and biological concentration factor (BCF) values than plants inoculated with R.

Significantly higher levels of PCV2-specific IgG in the sera of m

Significantly higher levels of PCV2-specific IgG in the sera of mice were observed upon oral BYL719 administration

of strain cultures expressing the PCV2 antigen. These results suggest that it is feasible to use L. lactis as an antigen delivery vehicle for developing oral vaccines against PCV2 infection. (C) 2008 Elsevier B.V. All rights reserved.”
“The aim of this study was to further elucidate the mechanisms involved in adaptive changes of GABA(A) receptors following prolonged exposure to flumazenil, the antagonist of benzodiazepine binding sites on GABAA receptors. The effects of prolonged flumazenil treatment were studied on recombinant alpha(1)beta(2)gamma(2S) GABA(A) receptors stably expressed in human embryonic kidney (HEK 293) cells. Using radioligand binding experiments we found enhancement in the maximum number of [H-3]muscimol labeled binding sites in different preparations of HEK 293 cells. The parallel increase of[3 H]flunitrazepam binding sites in the membranes was reduced in the presence of actinomycin D and cycloheximide, inhibitors of RNA and protein synthesis, respectively. Chronic flumazenil also raised the steady-state level of mRNA encoding a, receptor subunit. The results suggest that the up-regulation of GABAA receptors, observed https://www.selleckchem.com/products/mln-4924.html after prolonged flumazenil treatment

is at least partly due to increased de novo synthesis of receptor proteins at both transcriptional and translational level. (c) 2008 Elsevier Ireland Ltd and the Japan Neuroscience Society. All rights reserved.”
“Three simian virus 40 (SV40) reporter viruses were constructed in this study.

One expresses the green fluorescent protein (GFP) as a fusion protein with the first exon of large-T (IT) antigen and is useful for live-cell imaging. A second reporter virus has a FLAG epitope tag at the C-terminus of large-T antigen (vC-LTFLAG), and a third has the FLAG tag at the N-terminus of IT (vN-LTFLAG). very The vC-LTFLAG construct grows to titers near those of wild-type (WT) virus and functions well as a reporter virus for SV40 infection. The vN-LTFLAG construct, while viable, has a defect in the production and spread of infectious particles. All three viruses are useful in detecting superinfecting virus in cells in which nuclear IT is already present, such as persistently infected human mesothelial cells. (C) 2008 Elsevier B.V. All rights reserved.”
“A mechanism by which exercise improves brain function may be attributed to increase in cerebral blood volume (CBV) with physical activity. However, the exact exercise intensity that influences CBV is still uncertain. To clarify this issue, 10 healthy young male participants were asked to perform a graded cycling exercise to the point of exhaustion while their prefrontal cortex CBVs are being monitored using near-infrared spectroscopy. Overall responsive cerebral oxygenation showed a non-linear pattern with three distinct phases.

At the same time, an organic factor, namely, a worsening of the p

At the same time, an organic factor, namely, a worsening of the patient’s asthma, was identified as the cause of an increased fragmentation of sleep. Conclusions: In some cases of non-REM parasomnia, detailed dream-like mentation may act as a bridge between psychosocial stressors and the specific parasomnic behavior.”
“Introduction: Since the development of endovascular aneurysm repair (EVAR), there remains concerns regarding its durability, need for secondary procedures, and associated long-term morbidity.

We compared these two approaches to evaluate secondary interventions and their respective long-term durability.

Methods: All patients who had undergone endovascular and open abdominal aortic aneurysm (AAA) repair were identified from a prospectively maintained Fedratinib order registry. Health system charts, medical communication, and national death indexes were reviewed. Secondary interventions were classified as vascular (aortic graft or remote) and nonvascular (incisional or gastrointestinal).

Results: Between July 1985 and September 2009, 1908 patients underwent 1986 AAA repair procedures (EVAR = 1066; open = 920). Patients were followed up to 290 months

(mean 27.6 +/- 35.9) and identified with 427 surgical encounters (EVAR 233% to 21.9%; open 194% to 21.1%). Most encounters (338% to 74.6%) Selleckchem Quisinostat were related to vascular disease: 178 (EVAR = 131; open = 47) related to the aortic graft; 160 (EVAR = 93; open = 67) were related to nonaortic vascular disease. The remaining 89 surgical encounters included click here incisional hernias, small bowel obstruction, intra-abdominal abscesses, and wound dehiscence requiring operation. Of these 89 encounters (EVAR = 9; open = 80), 44 patients required surgical intervention and

36 required hospitalization without surgical procedure. Over the period of 100 months, the all-cause mortality rate was 25.2% after EVAR and 39.1% after open repair. One-year survival was 88.0% (SE 0.01) and 85.0% (SE 0.01), while 5-year survival was 58.0% (SE 0.02) and 53.0% (SE 0.02) for EVAR and open repair, respectively (log-rank P value < .0164). Seven-year survival was 46% (SE 0.03) for EVAR and 36% (SE 0.03) for open AAA repair.

Conclusion: EVAR requires more late secondary vascular interventions than open AAA repair, but patients who undergo open repair have more nonvascular long-term morbidity. Long-term survival is better after EVAR compared to open repair in this selected patient group. (J Vasc Surg 2011;54:1592-8.)”
“Parkinson’s disease (PD) is a progressive neurodegenerative disorder whose etiology is thought to have environmental (toxin) and genetic contributions. The neurotoxin 1-methyl-4-phenyl-1,2,3,6-tetrahydropyrimidine (MPTP) induces pathological features of PD including loss of dopaminergic neurons in the substantia nigra pars compacta (SNpc) and striatal dopamine (DA) depletion.

After cloning cDNA encoding the mature sequence of human interleu

After cloning cDNA encoding the mature sequence of human interleukin-8 (hIL8) into the yeast two-hybrid system vector, we have screened the human scFv antibody library and obtained three distinct scFv clones that could specifically bind to hIL8. One clone was chosen for further improvement by a novel affinity maturation process using the error-prone PCR of the scFv sequence followed by additional rounds of yeast two-hybrid screening. The scFv antibodies of both primary and affinity-matured scFv clones were expressed in E. coil.

All purified scFvs showed specific binding to hIL8 in reciprocal coimmunoprecipitation and ELISA assays. All scFvs, as well as a fully human IgG antibody converted from one of the scFv clones and expressed in the mammalian cells, were able to effectively inhibit hIL8 in neutrophil chemotaxis assays. Cilengitide mw The technology described can generate fully human antibodies with high efficiency and low cost.”
“A growing body of evidence suggests that exercise enhances hippocampal plasticity and function through BDNF up-regulation, which is potentiated by antidepressant treatment. However, little is known about the molecular mechanisms mediating the effect of exercise. The

present study investigated see more the effect of treadmill exercise on PI3K/Akt signaling, which mediates synaptic plasticity in the hippocampus of stressed Nabilone rats. Rats were subjected to immobilization stress 2 h/day for 7 days. The rats were run on the treadmill at a speed of 15 m/min, 30 min/day, for 5 days. Western blotting was used to assess changes in the levels of phospho-tyr(490)-Trk receptor, phospho-ser(473)-Akt, phospho-ser(9)-GSK-3 beta, phospho-ser(2448)-mTOR, and phosphor-thr(389)-p70S6K, and in BDNF and various synaptic proteins. Immobilization stress significantly decreased BDNF expression and phosphorylation of Trk receptor, Akt, GSK-3 beta, mTOR, and p70S6K

in the hippocampus of rats; furthermore, synaptophysin, PSD-95, neuroligin 1, and beta-neurexin were decreased. Treadmill exercise significantly attenuated the decreased expression of these proteins. Moreover, exercise significantly increased PI3K/Akt signaling in the absence of immobilization stress. These results suggest that treadmill exercise reverses stress-induced changes in the rat hippocampus via an increase in PI3K/Akt signaling and may induce a functional reconnection of hippocampal synapses that mediate antidepressant actions. (C) 2013 Elsevier Ireland Ltd and the Japan Neuroscience Society. All rights reserved.”
“Phage holins and endolysins have long been known to play key roles in lysis of the host cell, disrupting the cytoplasmic membrane and peptidoglycan (PG) layer, respectively. For phages of Gram-negative hosts, a third class of proteins, the spanins, are involved in disrupting the outer membrane (OM).