Structural features of residue 21 in chain A

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Electrostatic Interactions:
ASP A 10 OD1	HIS A 21 ND1	-1.843	INTRA-CHAIN
ASP A 10 OD2	HIS A 21 ND1	-1.905	INTRA-CHAIN
HIS A 21 ND1	ASP A 10 OD1	-1.843	INTRA-CHAIN
HIS A 21 ND1	ARG E 26 NH1	2.139	INTER-CHAIN
HIS A 21 ND1	HIS A 56 ND1	0.747	INTRA-CHAIN
HIS A 21 ND1	HIS A 56 NE2	1.958	INTRA-CHAIN
HIS A 21 ND1	HIS E 60 NE2	1.569	INTER-CHAIN
HIS A 21 ND1	HIS C 65 ND1	0.774	INTER-CHAIN
HIS A 21 ND1	HIS C 65 NE2	1.545	INTER-CHAIN
HIS A 21 ND1	HIS D 65 ND1	0.765	INTER-CHAIN
HIS A 21 ND1	HIS D 65 NE2	1.534	INTER-CHAIN
HIS A 21 NE2	ASP A 10 OD1	-1.577	INTRA-CHAIN
HIS A 21 NE2	HIS A 56 ND1	0.829	INTRA-CHAIN
HIS A 21 NE2	HIS A 56 NE2	2.220	INTRA-CHAIN
HIS A 21 NE2	HIS D 65 ND1	0.756	INTER-CHAIN
HIS A 21 NE2	HIS D 65 NE2	1.529	INTER-CHAIN
HIS A 56 ND1	HIS A 21 ND1	0.747	INTRA-CHAIN
HIS A 56 ND1	HIS A 21 NE2	1.865	INTRA-CHAIN
HIS A 56 NE2	HIS A 21 ND1	0.870	INTRA-CHAIN
HIS A 56 NE2	HIS A 21 NE2	2.220	INTRA-CHAIN
HIS C 65 ND1	HIS A 21 ND1	0.774	INTER-CHAIN
HIS C 65 NE2	HIS A 21 ND1	0.687	INTER-CHAIN
HIS D 65 ND1	HIS A 21 ND1	0.765	INTER-CHAIN
HIS D 65 ND1	HIS A 21 NE2	1.700	INTER-CHAIN
HIS D 65 NE2	HIS A 21 ND1	0.682	INTER-CHAIN
HIS D 65 NE2	HIS A 21 NE2	1.529	INTER-CHAIN
HIS E 60 NE2	HIS A 21 ND1	0.698	INTER-CHAIN

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Van der Waal's Interactions:
HIS A 21 NE2 192	LEU D 68 CD2 2623	-0.527	INTER-CHAIN