通常是戊糖的C1'与嘧啶碱的N1或嘌呤碱的N9相连接 Memory tips:"911" NH. NH HOCH2 HOCH H H H H OHOH OH OH OH OH Cytidine Uridine Adenosine Hypoxanthine HOCHa H()(H OH OH OH OH Guanosine Inosine,a less common nucleoside DNA和RNA中碱基均为反式构象DNA和RNA中碱基均为反式构象 通常是戊糖的C1′与嘧啶碱的N1或嘌呤碱的N9相连接 Memory tips: “911