One such protein is bovine pancreal trypsin inhibitor (BPTI), which has 58 amino acid residues in a single.chain and contains three disulfide bonds.

• 此种蛋白质的一个例子就是牛胰胰蛋白酶抑制剂(BPTI)，它有58个氨基酸残基，呈但链，含有三个二硫键。