[Attachment of long fibrils at various stages of assembly of the virus particle of a bacteriophage].

Bacteriophage T4 fibrillar structural elements were obtained when the basal plates and their complexes with the core were complemented in vitro with long tail fibrils. The organisation and functioning of the complexes were studied using PAAG electrophoresis, electron microscopy and sedimentation analysis. About 80% of the particles attached fibrils and were biologically active structures, i.e. could participate in the process of infection. Apparently, the organisation of virus particles is not a strictly regulated and consistent process at all the steps, but only at certain stages of their formation.