H H N Cl N c.I' H 4-N OPN N一H c.l' H s H.ans4 Hydrogenbonding patterns in the base pairs defined by Watson and Crick
Hydrogenbonding patterns in the base pairs defined by Watson and Crick
pairings of bases tend (to varying degrees) to de belical structure 04m ( a6 20nm b DNA分子结构
DNA分子结构