Fermentation technologies are used to produce nutrients (such as particular essential amino acids or complete proteins) or to improve the digestibility of animal feeds.

利用发酵技术来生产营养剂(如某些必需氨基酸或全价蛋白质)或提高动物饲料的消化率。

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By 1999 HGS had identified the complete genes for 9, 000 such proteins.

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