Extended Data Fig1D: Individual contour lengths for control during hydrodynamic stretching n=10 15.524 15.346 15.552 15.624 15.34 15.581 16.077 16.103 16.518 15.726 Individual contour lengths of DNA in the presence of 0.5 nM FoxA1 during hydrodynamic stretching n=9 16.228 16.85 17.421 16.691 14.204 16.807 15.91 15.766 16.629