Changes in Storage Protein Components of Developing Soybean Seeds (Glycine max var. Enrei).

Abstract

In a study of the relationship between the dynamic changes in cellular organelles and biosynthesis of soybean storage proteins, we found that as the protein components accumulated, the α and α′-subunits of 7S globulin appeared first, followed successively by the acidic and basic subunits of 11S globulin and finally by the β-subunit of 7S globulin. Labeling experiments using tissue slices showed that the radioactivities of (3H)leucine and (14C)N-acetyl-d-glycosamine were incorporated into the trichloroacetic acid insoluble fraction and that (14C)N-acetyl-d-glycosamine was specifically incorporated into 7S.