Using SOS electrophoresis, B. deracea,B. carinate and B. napus were comparatively studied for protein in their yellow seeds and brown seeds. the results showed that: 1) There were remarked differences among their, with unique protein bands for each sample. 2) The brown seeds had more proteins than the yellow seeds, probablly due to a block association between the genes for protein synthesis and genes for seed epidermis color. 3) Based on the numbers, width and similarity index of the protein bands, B.carina...