Fig. 4: HCA2 key residue with ligands recognition.
From: Structural insights into the human niacin receptor HCA2-Gi signalling complex

Key residue and ligands are shown as sticks and spheres. Inactive state HCA2 in orange color, active state cryo-EM structure of HCA2 with MK-6892 and Gi complex in green and grey, respectively. Docking structure with niacin in cyan, acifran in purple, MK-1903 in pink, and MK-0354 in magenta.