A methyl group is a basic unit in organic chemistry: one carbon atom attached to three hydrogen atoms.
甲基是有机化学的基本单位：一个碳原子连接三个氢原子。
Much is known about the "fifth base, " 5-methylcytosine, which arises when a chemical tag or methyl group is tacked onto a cytosine.
此前，科学家们已对第5种碱基有所了解——当一个化学标签或甲基被固定到一个胞嘧啶上时，第5种碱基就会出现。
In healthy cells a compound called a methyl group is tagged to DNA where it ACTS as a "red light", preventing certain genes from producing proteins.
在正常细胞中，甲基作为DNA标记的一个“红灯”，阻止某些基因合成蛋白质。
Substitution of methyl group at 1,2 and 3 position on 1-methylindole, 2-methylindole and 3-methylindole inhibits initial microbial attack significantly.
同时，1、2或3位上的甲基替代使1 甲基吲哚，2 甲基吲哚和3 甲基吲哚的降解受到严重抑制。
Substitution of methyl group at 1,2 and 3 position on 1-methylindole, 2-methylindole and 3-methylindole inhibits initial microbial attack significantly.
同时，1、2或3位上的甲基替代使1 甲基吲哚，2 甲基吲哚和3 甲基吲哚的降解受到严重抑制。
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