腺嘌呤指分子的一部分，即含氮碱基。
Adenine refers to a portion of the molecule, the nitrogenous base.
核苷的含氮碱基来自两种复合物，嘧啶和嘌呤。
The nitrogenous bases are derivatives of two parent compounds, pyrimidine and purine.
鸟嘌呤：嘌呤类的有机化合物，常称为碱基，包含二个环，各含氮原子和碳原子，还有一个氨群。
Guanine: organic compound of the purine family often called a base consisting of two rings each containing both nitrogen and carbon atoms and an amino group.
腺嘌呤：在DNA和RNA中发现的含氮的碱基(6-氨基嘌呤)。
Adenine a nitrogenous base (6 - amino - purine) found in DNA and RNA.
腺嘌呤：在DNA和RNA中发现的含氮的碱基(6-氨基嘌呤)。
Adenine a nitrogenous base (6 - amino - purine) found in DNA and RNA.
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