Dipole Effects on Ion Transport Demonstrated in Aprotic Solvents

Abstract

changes in nucleosomes. Our immediate goal is to measure the structural changes in single nucleosomes and nucleosome arrays in response to transcription factor (TF) binding. Initial experiments using the nucleosomecaliper construct with GAL4-VP16, a hybrid transcription factor capable of highly-efficient transcription activation, shows that the angular distribution broadens as a result of increasing TF concentrations. Our measurements revealed a dissociation constant in the range of 1-10nM, which agrees with bulk measurements. These results demonstrate the potential of a DNA origami device probing chromatin structure and function in vitro, in particular, the ability to measure structural changes in the range of 10-100nm.