鸟嘌呤 Guanine
（重定向自Guanine nucleotides）
鸟嘌呤（英语：Guanine，又称鸟粪嘌呤）是五种不同碱基中的其中之一，并同时存在于脱氧核糖核酸（DNA）及核糖核酸（RNA）中。鸟嘌呤是嘌呤的一种，并与胞嘧啶（cytosine）以三个氢键相连。
Guanine nucleotides
中文百科
英语百科
Guanine 鸟嘌呤
（重定向自Guanine nucleotides）
Guanine /ˈɡwɑːnᵻn/ (G, Gua) is one of the four main nucleobases found in the nucleic acids DNA and RNA, the others being adenine, cytosine, and thymine (uracil in RNA). In DNA, guanine is paired with cytosine. With the formula C5H5N5O, guanine is a derivative of purine, consisting of a fused pyrimidine-imidazole ring system with conjugated double bonds. Being unsaturated, the bicyclic molecule is planar. The guanine nucleoside is called guanosine.
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