Fig. 6From: Variations in periplasmic loop interactions determine the pH-dependent activity of the hexameric urea transporter UreI from Helicobacter pylori: a molecular dynamics studyRelative free energy maps for the hpUreI system at distinct pH conditions. a Energy map at pH 2.0 based on the distance between inter-loop and PL1 intra-loop residues. b Energy map at pH 2.0 based on the distance between inter-loop and inter-chain residues. c Energy map at pH 6.0 based on the distance between inter-loop and PL1 intra-loop residues. d Energy map at pH 7.4 based on the distance between inter-loop and PL1 intra-loop residues. Local minima are represented in black boxes for every energy mapBack to article page