摘要
在体外消化酶模拟条件下,对小麦籽实中Ｃｄ,Ｐｂ蛋白质结合体的稳定性进行了研究．结果表明:小麦籽实中存在的表观分子量为５４．５×１０３和５．５×１０３的蛋白质－Ｃｄ,Ｐｂ结合体,在体外胃蛋白酶和胰蛋白酶消化后,蛋白质结构发生变化．特别是分子量为５４．５×１０３的Ｃｄ,Ｐｂ－蛋白质结合体不稳定,容易被胰蛋白酶分解,变成分子量为５．５×１０３的稳定的Ｃｄ,Ｐｂ－蛋白质结合体或更小的多肽．
The stability of protein - binding forms of Cd and Pb in polluted wheat seed was evaluated using the treatment of gastrointestinal enzyme digestion. The results showed that after the treatment of pepsin and trypsin enzyme digestion, the protein - bin-ding forms of Cd and Pb with molecular weight of 54.5 × 103 and 5.5 × 103 in wheat seed was decomposed. Especially, the protein-binding forms of Cd and Pb with the apparent molecular weight of 54.5 × 103 were easily decom-posed by the trypsin and changed into the low molecular weight protein - binding forms (5.5 × 103) or tiny peptide chain.
出处
《环境化学》
CAS
CSCD
北大核心
2001年第2期124-128,共5页
Environmental Chemistry
基金
国家自然科学基金资助项目(49771069)
