in addition to quantitative adaptation of trnas to the composition of silk proteins ( fibroin from the posterior silk gland , sericin from the middle part ) and of iso-trnas from posterior silk gland to the major codons of fibroin mrna , we also observe adaptation of trna from various tissues to the average amino acid content of proteins from fat body , gut , gonads and carcass of the silkworm .
C0074529
silk
C0074364
sericin