the univalent radical CH3- derived from methane

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。

Darwin taught us that it takes many generations for a genome to evolve, but researchers have found that it takes only the addition of a methyl group to change an epigenome.

达尔文告诉我们基因进化需历经数代，而研究人员发现只有增加一组甲基，就能改变外基因。

Conclusion Introducing the methyl group or a low alkyl group resulting in the high selectivity and increase of its activity.

结论甲基或低级烷基的引入导致了高选择性，使其活性增大。

Trigonelline is unstable above 160 degrees F; the methyl group detaches, unleashing the niacin-vitamin b3-into your cup.

胡芦巴堿华氏160度以上时化学性质不稳定，甲基脱落，释放出烟堿酸，也就是维生素b3。

The methyl group (CH3) attached to the methionine sulfur atom in SAM is chemically reactive.

甲基基团（CH3）附着在SAM中蛋氨酸硫原子具有化学反应性。

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种堿基有所了解——当一个化学标签或甲基被固定到一个胞嘧啶上时，第5种堿基就会出现。

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。

When a methyl group attaches to a specific spot on a gene - a process called DNA methylation.

甲基附加到基因上某个特殊点的过程，称为DNA甲基化。