[Organization and primary nucleotide sequence of 5S rRNA genes in barley Hordeum vulgare].

A BamHI DNA fragment of 301 bp corresponding to the main repeating unit of 5S rRNA was isolated from barley genomic DNA. The primary nucleotide sequence of this fragment was determined and a high level of homology was found between coding sequences of 5S rRNA genes of barley, wheat and rye. At the same time, spacer's nucleotide sequences of different species of cereals were changed dramatically.

[Synthesis of octapeptides containing fragments of lac-repressor primary structure].

Four octapeptides containing the dipeptide fragments of the lac-repressor primary structure have been synthesized. The general scheme of synthesis consisted in the preparation of tetrapeptides using successive elongation from the C-terminus by the mixed anhydride method followed by their condensation into octapeptides.