The other two, thymine and cytosine, are single ring structures called pyrimidines.
另两个为胸腺嘧啶和胞嘧啶, 即称为嘧啶的单环结构.
It also donates an amino group in synthesis reactions, e . g . the synthesis of purines and pyrimidines.
还可参加合成反应生成一系列的氨基酸, 例如嘌呤和嘧啶的合成.
Purines and pyrimidines have widespread and specific action in many tissues of both invertebrates and vertebrates.
在脊椎类和无脊椎类动物的多种组织中,嘧啶与嘌呤类物质具有广泛的特异性作用.