Peptides, such as calcitonin, having two cysteine residues connected by a disulfide bond are prepared by a process which includes the step of cyclizing the cysteines at a pH of 8.5 to 9.0, and a concentration of 0.4 to 1.8 mg of peptide per ml of solution. These novel conditions produce rapid cyclization with an unforeseen improvement in yield.
在制备
降钙素等
多肽时,需要将两个半胱
氨酸残基通过二
硫键连接起来,其中包括在 pH 值为 8.5 至 9.0、每毫升溶液中含有 0.4 至 1.8 毫克
多肽的条件下对半胱
氨酸进行环化。 在这些新条件下,环化速度很快,产量也有了意想不到的提高。