superhelix

n.

超螺旋；

DNA gyrase: an enzyme that introduces superhelical turns into DNA
Determination of the number of superhelical turns in simian virus 40 DNA by gel electrophoresis
Generation of superhelical torsion by ATP-dependent chromatin remodeling activities.
Characterization of nuclear structures containing superhelical DNA
Purified Escherichia coli recA protein catalyzes homologous pairing of superhelical DNA and single-stranded fragments
Kinetic analysis of deoxyribonuclease I cleavages in the nucleosome core: Evidence for a DNA superhelix
The superhelical TPR-repeat domain of O-linked GlcNAc transferase exhibits structural similarities to importin alpha
Mechanism of mitochondrial DNA replication in mouse L-cells: introduction of superhelical turns into newly replicated molecules.
Early and late helix-coil transitions in closed circular DNA. The number of superhelical turns in polyoma DNA.
Uptake of Homologous Single-Stranded Fragments by Superhelical DNA: A Possible Mechanism for Initiation of Genetic Recombination