Figure 6From: Fragment-based identification of determinants of conformational and spectroscopic change at the ricin active siteGeometry of the arginine 180 – tryptophan 211 interaction. The structure of RTA without a ligand (1IFT [7]) is in yellow, overlaid on the RTA-NMU complex in purple. Distances from the ring centroid to arginine 180 NH1 in the RTA-NMU complex are indicated.Back to article page