主题：【原创】【整理】致高尔夫、南方系，并安慰忘情兄 -- 巅峰背影

所以我说rBST 是转基因产品，并不是说其本身是转基因。

牛本身就有BST基因，并生产BST： Bovine somatotropin (abbreviated bST and BST), or BGH （Bovine Growth Hermone), is a chain of amino acids produced by the cow's pituitary gland. Like other hormones, it is produced in small quantities and is used in regulating metabolic processes.

孟山都把牛的基因转到大肠杆菌里， 是为了生产更多的激素给牛人为添加。