Fig. 6From: Role of the highly conserved G68 residue in the yeast phosphorelay protein Ypd1: implications for interactions between histidine phosphotransfer (HPt) and response regulator proteinsGlutamine residue adds bulk to the binding surface. Transparent surface of Ypd1-G68Q (magenta) overlaid with wild-type Ypd1 (cyan) (PDB ID: 1QSP). The volume of the H64 surface is shown in blue and the added bulk of the glutamine side chain is shown in yellowBack to article page