Fig. 6From: Xanthine oxidase inhibitory potentials of flavonoid aglycones of Tribulus terrestris: in vivo, in silico and in vitro studies2D (A) and 3D (B) simulations of allopurinol–XOD active site supramolecular bondings, showing a conventional hydrogen bond (with THR1093) and a pi-sigma bond interaction (with GLN1040) that are neither of substrate binding nor of catalytic importanceBack to article page