centromere
telomere
plasmid
DNA supercoiling
supercoiled DNA
relaxed DNA
DNA topology
closed-
DNA underwinding
linking number (Lk)
superhelical density (σ)
negative supercoiling
positive supercoiling
topoisomer
writhe (Wr)
twist (Tw)
plectonemic supercoiling
solenoidal supercoiling
topoisomerase
type I topoisomerase
type II topoisomerase
catenane
SMC protein
cohesin
condensin