Structural features of residue 21 in chain C

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Electrostatic Interactions:
HIS B 60 ND1	HIS C 21 ND1	1.040	INTER-CHAIN
HIS B 60 ND1	HIS C 21 NE2	2.329	INTER-CHAIN
HIS B 60 NE2	HIS C 21 ND1	1.113	INTER-CHAIN
HIS B 60 NE2	HIS C 21 NE2	2.553	INTER-CHAIN
HIS B 65 ND1	HIS C 21 ND1	0.843	INTER-CHAIN
HIS B 65 ND1	HIS C 21 NE2	1.642	INTER-CHAIN
HIS B 65 NE2	HIS C 21 ND1	0.828	INTER-CHAIN
HIS B 65 NE2	HIS C 21 NE2	1.640	INTER-CHAIN
ASP C 14 OD1	HIS C 21 ND1	-1.375	INTRA-CHAIN
ASP C 14 OD2	HIS C 21 ND1	-1.477	INTRA-CHAIN
HIS C 21 ND1	ASP C 14 OD1	-1.375	INTRA-CHAIN
HIS C 21 ND1	HIS F 60 ND1	0.714	INTER-CHAIN
HIS C 21 ND1	HIS F 60 NE2	1.565	INTER-CHAIN
HIS C 21 ND1	HIS B 60 ND1	1.040	INTER-CHAIN
HIS C 21 ND1	HIS B 60 NE2	2.503	INTER-CHAIN
HIS C 21 ND1	HIS B 65 ND1	0.843	INTER-CHAIN
HIS C 21 ND1	HIS B 65 NE2	1.863	INTER-CHAIN
HIS C 21 ND1	ARG E 70 NH1	2.261	INTER-CHAIN
HIS C 21 NE2	ASP C 14 OD1	-1.569	INTRA-CHAIN
HIS C 21 NE2	HIS B 60 ND1	1.035	INTER-CHAIN
HIS C 21 NE2	HIS B 60 NE2	2.553	INTER-CHAIN
HIS C 21 NE2	HIS B 65 ND1	0.730	INTER-CHAIN
HIS C 21 NE2	HIS B 65 NE2	1.640	INTER-CHAIN
HIS C 21 NE2	ARG E 70 NH1	2.654	INTER-CHAIN
ARG E 70 NH1	HIS C 21 NE2	2.654	INTER-CHAIN
ARG E 70 NH2	HIS C 21 NE2	2.353	INTER-CHAIN
ARG E 71 NH2	HIS C 21 NE2	2.127	INTER-CHAIN
HIS F 60 ND1	HIS C 21 ND1	0.714	INTER-CHAIN
HIS F 60 NE2	HIS C 21 ND1	0.695	INTER-CHAIN

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Van der Waal's Interactions:
TYR C 12 OH 1444	HIS C 21 NE2 1536	-0.601	INTRA-CHAIN
HIS C 21 NE2 1536	TYR C 57 OH 1841	-0.020	INTRA-CHAIN
HIS C 21 NE2 1536	LEU E 68 CD2 3313	-0.347	INTER-CHAIN