Energetics of the B–H transition in supercoiled DNA carrying d(CT)x.d(AG)xand d(C)n.d(G)ninserts

Abstract
We have studied the B–H transition in the d(AG)x inserts of varying length under superhelical stress. The new data and previously published results for the d(G)31 insert are treated within a phenomenological model of the B–H transition, making it possible to obtain, for the first time, the energy parameters of the B–H transition in the d(AG)x and d(G)n sequences.