大豆タンパク質とトリメチルアンモニウム4級アミン基を含む表面活性剤との相互作用(II) : コングリシニン及びグリシニンの微分スペクトルによる研究

概要

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In order to investigate their interactions, state of aromatic amino acid residues was qualitatively monitored by using of derivative ultra-violet (UV) absorption spectrophotometry. Choline and cetyltrimethylammonium bromide (CTAB) did not have an effect on the conformation of native soybean protein, but did on their heating. Difference derivative absorption spectra indicated that CTAB caused not only blue shift but also red shift on heating of conglycinin or glycinin. Transition of blue shift to red shift occurred at 10^<-4>M CTAB concentration, which may be suitable for promoting ionization of sulphydryl residue (SH) followed by inducing intermolecular reaction through sulphydryl - sulphide (SH-SS) exchange.