METHODS: Soluble collagen was extracted from calf fetus skin and was made nonantigenic with pepsin.

方法：可溶性胶原蛋白从小牛皮中提取，用胃蛋白酶处理而去除其抗原性。

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METHODS: Soluble collagen was extracted from calf fetus skin and was made nonantigenic with pepsin.

方法：可溶性胶原蛋白从小牛皮中提取，用胃蛋白酶处理而去除其抗原性。

youdao