Studies on the Protein Synthesis in Silkglands

V. The Relation of Ribosomes to Endoplasmic Reticulum during Fibroin Synthesis

抄録

1. By density gradient centrifugation, the homegenate of the posterior silkglands was divided into 6 fractions and their protein, RNA and lipid contents were analyzed before and after an incubation at 37°C and an aging at 4°C.
2. It was demonstrated that during the incubation, ribosomes detached from endo-plasmic reticulum and thereafter, C¹⁴-glycine did not so much incorporate into the secretory protein fraction. The role of ribosomes and endoplasmic reticulum on the fibroin synthesis was discussed.