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              adenine
               基礎(chǔ)科學(xué) 
              
				
              

					 
                      A nitrogenous base found in DNAand RNA. It is also a constituent of certaincoenzymes,e.g. NAD and FAD,and whencombined with the sugar ribose it forms thenucleoside adenosine found in AMP,ADP,and ATP. Adenine has a purine ring struc-ture. See illustration ......（本文共 329 字）      [閱讀本文] >> 
               
			  
				 
              
				 
				
				
              
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