Bases H 5 N N PURINES 24 8)-H 3 N H2N H H H Purine Adenine Guanine N N PYRIMIDINES 2;6 H N H rimini Cytosine Uracil Thymine
Bases
Ribose and deoxyribose H HO C OH H 2 HO OH bose HO OH H 2 HO Deoxyribose
Ribose and deoxyribose
Nucleosides核苷 C1:N1 C1:N9 N 5 8 6 3 1on2o、N HOCH 4K H Bm6 1 2 H OH H(OH) OH H(OH)
Nucleosides核苷 1’ 3’ 2’ 4’ 5’ (OH) 1’ 3’ 2’ 4’ 5’ (OH) C1 : N1 C1 : N9
假尿苷() c5:c1 HOCH H H OH OH
假尿苷（ψ） C5:C1 5 OH
Nucleosides NH OH NH2 oH N HON N HO N HO N HOCH2 O HOCH HOQ2 O HOCHO O HH HH H H H H H OH OH OHOH OHOH OHOH 腺嘌呤核苷鸟嘌呤核苷 胞嘧啶核苷 尿嘧啶核苷 Adenosine Guanosine Cytidine Uridine
Adenosine Guanosine Cytidine Uridine Nucleosides 腺嘌呤核苷 鸟嘌呤核苷 胞嘧啶核苷 尿嘧啶核苷 N N OH HO N N NH2 HO N N OH H2N N N N N N N NH2 O H H OH H OH H HOCH2 HOCH2 O H H OH H OH H O H H OH H OH H HOCH2 O H H OH H OH H HOCH2