实际上，DNA除了双螺旋结构，还可以形成其他的非B型DNA结构（图一B-G），包括左手双螺旋的Z DNA（B）、鸟嘌呤富集区域形成的G-四链体（G-quadruplex）（C）、DNA串联重复错配形成的Slipped ...

Do you ever stop and question why and how we have evolved to be the way we are? Survival is important to us, so why are we ...