[Physical mapping of the Bombyx mori nuclear polyhedrosis virus genome].

The restriction map of the nuclear polyhedrosis DNA virus of Bombyx mori has been determined with the use of four restriction endonucleases: NotI, BamHI, SmaI and KpnI. 18 cleavage sites have been localized on the viral DNA. Total length of the viral DNA is about 130 kb.

[Studies on protein biosynthesis in the silk gland of Bombyx mori L. silkworm].

The incorporation of (14C) lysine (to characterize the biosynthesis of cellular proteins) and (14C) glycine (for silk fibroin) in free and membrane-bound polyribosomes was studied in fibroin portion of the silk gland of Bombyx mori silkworm in the V instar. It was shown that although the membrane-bound polyribosomes are found in posterior silk gland from the beginning of the V instar, the fibroin biosynthesis in the membranebound polyribosomes takes place predominantly in the second part of the V instar. On the other hand the cellular proteins are synthesized mostly in the free polyribosomes in the first half of the V instar.