The substance, one of the first applications of genetic engineering to make its way into food production, is a synthetic version of a natural cow hormone called bovine somatotropin, or BST.
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- 這種激素刺激奶牛生產(chǎn)的牛奶是最初采用基因工程手段得到的食用產(chǎn)品。該激素是人工合成的天然牛激素，稱(chēng)作bovinesomatotropin，簡(jiǎn)稱(chēng)BST。
