title: [Various properties of virulent and moderate Erwinia carotovora phages].
abstract: A bacterial culture of E. carotovora 8638 lysed by virulent phage 62 after treatment with UV rays produces a moderate phage. The virulent and moderate viruses, antigenically unrealted, have a similar prolonged latent period (100 min) and the period of lysis (60 min). They also differ in the sizes of the capsids and the length of processes which are 750+/-30 and 2000+/-50A in the virulent phage and 600+/-30 and 1500+/-50A, in the moderate phage, respectively. The sedimentation constants are 602 and 340 S, respectively. In the virulent virus, the volume of the cavity of the protein capsid contianing 8 major and 5 minor peptides is twice as large as that in the moderate one (with 8 peptides); the molecular weight of their DNA shows approximately similar ratios: 52.53+/-17X10(6) and 29.79+/-0.88X10(6) daltons. Evidently, the moderate phage because of the reduced size of the genome contains less message for coding for structural proteins and nucleoprotein as a whole.
mesh_terms: D000956:Antigens, Viral / Q000032:analysis; D001435:Bacteriophages / Q000032:analysis / Q000254:growth & development* / Q000276:immunology; D002213:Capsid / Q000032:analysis; D004279:DNA, Viral / Q000032:analysis; D000939:Epitopes; D004885:Erwinia; D008242:Lysogeny; D008970:Molecular Weight; D010455:Peptides / Q000032:analysis; D014466:Ultraviolet Rays; D014764:Viral Proteins / Q000032:analysis; D014779:Virus Replication
chemical_list: D000956:Antigens, Viral; D004279:DNA, Viral; D000939:Epitopes; D010455:Peptides; D014764:Viral Proteins
vernacular_title: Nekotorye svoĭstva virulentnogo i umerennogo fagov Erwinia carotovora