gua.ninen.Abbr. G(名词)缩写 GA purine base, C5H 5ON 5, that is an essential constituent of both RNA and DNA. 鸟嘌呤:一种嘌呤碱,分子式为C5H 5ON 5,为核糖核酸和脱氧核糖核酸的主要组成部分 来源:From guano [in which it is found] 源自 guano[在此发现]