稀有碱基 H CH3 NH2 CH3 NS-Methyladenine(mSA) 5-Methylcytosine(m5C)
稀有碱基
戊糖 HOCH2 0 OH HOCH2 0 OH H CI H HC】 OH OH OH Look Ma, no oxygen! Ribose Deoxyribose
戊糖
核苷与核苷酸 1核苷： 2核苷酸
•核苷与核苷酸 1. 核苷： 2. 核苷酸
核苷 H HOCH2 NH2 Nitrogenous base H H H CI C H OH H Deoxyribose (sugar) Nucleoside
核苷
糖苷键 NH2 NH2 HOCH2 0 HOCH2 H 3 2” 3 2 OH OH OH OH B-N-glycosidic bond in B-Ng-glycosidic bond in pyrimidine ribonucleosides purine ribonucleosides
糖苷键