Fig. 2
From: GPR91: expanding the frontiers of Krebs cycle intermediates
Schematic model of the GPR91 active site. Surface representation of succinate binding at the active site with electrostatic potential (red, blue for negative and positive potential, respectively) computed with the GPR91 tool in Website Protein Data Bank (PDB). a through c represent consecutive higher magnifications of the succinate binding site on GPR91