Table 5. Hydrogen bond interaction parameters for each compound and IDO residues.

Receptor	Compound	Donor atom	Receptor atom	Distances (Å)
IDO	Epacadostat	A:CYS129: SG	Epacadostat: F7	3.09
		A:CYS129:SG	Epacadostat:Br8	2.62
		A:ALA264:N9	Epacadostat:O12	3.11
		A:ALA264:N9	Epacadostat:N9	2.83
	ZINC000003791817	A:GLY261: HN	ZINC000003791817: O7	2.52
		A:SER167: OG	ZINC000003791817: H57	2.04
		A: PHE163:O	ZINC000003791817: H57	3.01
	ZINC000012495022	A:GLY236:HN	ZINC000012495022:O7	2.01