Fig. 9From: Indoleamine 2,3-dioxygenase 1 (IDO1) inhibitors in clinical trials for cancer immunotherapyThe co-crystal structure of the complex IDO1-PF06840003 (PDB code: 5WHR). The heme site is colored in green. The inhibitor PF06840003 is displayed in yellow stick. The H-bonding interactions between PF06840003 and the IDO1 protein matrix are indicated by the blue dotted linesBack to article page