知識(shí)貝殼
知識(shí)貝殼
A nitrogenous base found in DNAand RNA. It is also a constituent of certaincoenzymes,for example NAD and FAD,and when combined with the sugar ribose it forms thenucleoside adenosine,found in AMP,ADP,andATP.Adenine is a PURINE,and contains a pairof fused r ......（本文共 344 字 ） [閱讀本文] >>