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Bessman and colleagues then “knocked-out” the gene and, predictably, the bacteria made 10 times less folate than usual. 儅研究人員敲除細(xì)菌的這種基因後發(fā)現(xiàn),其結(jié)果和預(yù)想的一樣,細(xì)菌制造的葉酸比正常情況少減少了10倍。