Supercoiled DNA 超螺旋DNA ; dna超螺旋结构

negatively supercoiled DNA 负超螺旋DNA

positively supercoiled DNA 正超螺旋DNA

Negative Supercoiled 负超螺旋

supercoiled plasmid DNA 超螺旋质粒DNA

positive supercoiled 正超螺旋

cleavage of supercoiled dsdna 裂解超螺旋dsdna

supercoiled plasmid 超螺旋状质粒

supercoiled supercoil 超卷曲超螺旋