[The role of chromatoid bodies and cytoskeleton for differentiation of rat spermatozoids].

The ultrastructural and immunocytochemical study of rat male germ cells on different developing stages has been made. The investigation of morphological changes of spermatogenic cells has demonstrated the presence of tight connections between chromatoid bodies (CBs) and other cell organelles, particularly with the nucleus and Golgi apparatus; has revealed the association of manchette noncentrosomal microtubules (MT) with spermatid perinuclear ring plasma membrane (PM) in the zone of the adhesion intercellular contact--zonula adhaerens (ZA). The comparison of the results obtained in this work with available literary data has given possibility to analyze expected pathways of noncentrosomal MT nucleation in the late spermatids.

[Specific properties and primary structure of BASP1 protein, initially detected in neuronal axonal terminals].

The BASP1 protein is one of the acidic (pI 4.3-4.6) acid-soluble brain proteins; it is predominant in growth cones and presynaptic regions of neurons.

[High plasmid pBR322 multimerization in Escherichia coli B].

In bacteria E. coli B (wild) plasmid pBR322 is present as a set of circular supercoiled multimers formed of up to 20 head-to-tail linked monomers. The highest degree of plasmid multimerization was achieved when the bacteria were grown in a mineral-glucose medium based on 0.