Researches in enzymes which digest allergic proteins of soybean

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We revealed that three major allergic proteins (alpha-subunit of beta-conglycinin, Gly m Bd 28K, Gly m Bd 30K) of soybean decrease remarkably under soybean seed germination or soybean seedling growth. Although alpha-subunit of beta-conglycinin and Gly m Bd 28K have disappeared until 5days after imbibition, Gly m Bd 30K started to decrease since 14days after imbibition. It shows that Gly m Bd 30 K is degraded by another protease from that degrade alpha-subunit of beta-conglycinin and Gly m Bd 28K. In addition, Gly m Bd 28K in solution prepared from soybean seedlings decreased when its solution was incubated. Such in vitro decrease of Gly m Bd 28 K was disturbed by addition of aspartic protease inhibitor. It indicates that some kind of aspartic protease degrade Gly m Bd 28K.