Structural features of residue 21 in chain C

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Electrostatic Interactions:
ASP A 83 OD1	HIS C 21 ND1	-2.267	INTER-CHAIN
ASP A 83 OD2	HIS C 21 ND1	-2.509	INTER-CHAIN
ARG A 87 NH1	HIS C 21 NE2	2.640	INTER-CHAIN
ARG A 87 NH2	HIS C 21 NE2	2.449	INTER-CHAIN
ARG B 140 NH1	HIS C 21 NE2	8.316	INTER-CHAIN
ARG B 140 NH2	HIS C 21 NE2	8.448	INTER-CHAIN
ARG C 19 NH1	HIS C 21 NE2	2.764	INTRA-CHAIN
ARG C 19 NH2	HIS C 21 NE2	2.384	INTRA-CHAIN
HIS C 21 ND1	ARG C 19 NH1	2.731	INTRA-CHAIN
HIS C 21 ND1	ASP C 24 OD1	-3.652	INTRA-CHAIN
HIS C 21 ND1	ASP C 28 OD1	-1.914	INTRA-CHAIN
HIS C 21 ND1	ARG C 64 NH1	2.586	INTRA-CHAIN
HIS C 21 ND1	ASP A 83 OD1	-2.267	INTER-CHAIN
HIS C 21 ND1	ARG A 87 NH1	2.756	INTER-CHAIN
HIS C 21 ND1	ARG C 110 NH1	3.347	INTRA-CHAIN
HIS C 21 ND1	ARG B 140 NH1	6.043	INTER-CHAIN
HIS C 21 NE2	ARG C 19 NH1	2.764	INTRA-CHAIN
HIS C 21 NE2	ASP C 24 OD1	-3.820	INTRA-CHAIN
HIS C 21 NE2	ASP C 28 OD1	-2.244	INTRA-CHAIN
HIS C 21 NE2	ARG C 64 NH1	3.071	INTRA-CHAIN
HIS C 21 NE2	ARG C 70 NH1	2.127	INTRA-CHAIN
HIS C 21 NE2	ASP A 83 OD1	-2.493	INTER-CHAIN
HIS C 21 NE2	ARG A 87 NH1	2.640	INTER-CHAIN
HIS C 21 NE2	ARG C 110 NH1	4.020	INTRA-CHAIN
HIS C 21 NE2	ARG B 140 NH1	8.316	INTER-CHAIN
ASP C 24 OD1	HIS C 21 ND1	-3.652	INTRA-CHAIN
ASP C 24 OD2	HIS C 21 ND1	-4.011	INTRA-CHAIN
ASP C 28 OD1	HIS C 21 ND1	-1.914	INTRA-CHAIN
ASP C 28 OD2	HIS C 21 ND1	-2.174	INTRA-CHAIN
ARG C 64 NH1	HIS C 21 NE2	3.071	INTRA-CHAIN
ARG C 64 NH2	HIS C 21 NE2	3.883	INTRA-CHAIN
ARG C 70 NH1	HIS C 21 NE2	2.127	INTRA-CHAIN
ARG C 110 NH1	HIS C 21 NE2	4.020	INTRA-CHAIN
ARG C 110 NH2	HIS C 21 NE2	3.566	INTRA-CHAIN

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Hydrogen bonds:

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|Res1 type| Res1 No.| Chain1| Res2 type| Res2 No.| Chain2|
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|        H|       21|      C|         S|      139|      B|
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Protrusion Index:
HIS C 21 N	0.86
HIS C 21 CA	0.88
HIS C 21 C	0.81
HIS C 21 O	0.63
HIS C 21 CB	0.97
HIS C 21 CG	1.00
HIS C 21 ND1	1.32
HIS C 21 CD2	0.89
HIS C 21 CE1	1.54
HIS C 21 NE2	1.19

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Van der Waal's Interactions:
ALA C 20 CB 2136	HIS C 21 NE2 2146	-0.278	INTRA-CHAIN
HIS C 21 NE2 2146	ASP C 24 OD2 2166	-0.145	INTRA-CHAIN
HIS C 21 NE2 2146	ASP A 83 OD2 588	-0.009	INTER-CHAIN
HIS C 21 NE2 2146	ARG B 140 NH2 1997	-0.313	INTER-CHAIN