Proteins ofSoybean Seeds

Soybean(Glycine max)storage proteins werecharacterized bysedimentation andbypolyacrylamide gelelectrophoresis underdissociating (8M urea)andnondissociating conditions. Threesedimenting classes ofproteins werefound,withsedimentation coefficients of2.2S,7.5S,and11.8S.The coefficients wererelated tothebandsobtained byelectrophoretic separation. The results supporttheideathatrelatively few proteins makeupthebulkoftheseedprotein.