它保证了H 4组蛋白有大量的乙酰基团粘附其上，所以环绕在组蛋白上的DNA能再次被翻译。

It ensures that the H4 histones have plenty of attached acetyl groups, so the DNA wrapped around the histone once again becomes available for transcription.

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甲烷2组改为NH或O和反之亦然，硝基成为羧酸和酰胺，OH基团成为氟原子，该名单是广泛的。

CH 2 groups were replaced by NH or o and vice versa, nitro groups became carboxylic acids and amides, OH groups became fluorine atoms; the list is extensive.

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原子因，基团，至少有一个游离电子的原子或一组原子。

An atom or a group of atoms with at least one unpaired electron.

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原子因，基团，至少有一个游离电子的原子或一组原子。

An atom or a group of atoms with at least one unpaired electron.

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