Structural features of residue 21 in chain A

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Electrostatic Interactions:
ASP A 14 OD1	HIS A 21 ND1	-1.361	INTRA-CHAIN
ASP A 14 OD2	HIS A 21 ND1	-1.382	INTRA-CHAIN
HIS A 21 ND1	ASP A 14 OD1	-1.361	INTRA-CHAIN
HIS A 21 ND1	ARG A 22 NH1	5.034	INTRA-CHAIN
HIS A 21 ND1	ARG A 27 NH1	5.006	INTRA-CHAIN
HIS A 21 ND1	ASP B 55 OD1	-2.012	INTER-CHAIN
HIS A 21 ND1	HIS A 67 ND1	0.700	INTRA-CHAIN
HIS A 21 ND1	HIS A 67 NE2	1.612	INTRA-CHAIN
HIS A 21 ND1	ASP A 143 OD1	-2.396	INTRA-CHAIN
HIS A 21 ND1	HIS A 144 ND1	1.175	INTRA-CHAIN
HIS A 21 ND1	HIS A 144 NE2	2.632	INTRA-CHAIN
HIS A 21 ND1	HIS A 176 ND1	1.032	INTRA-CHAIN
HIS A 21 ND1	HIS A 176 NE2	2.189	INTRA-CHAIN
HIS A 21 NE2	ARG A 22 NH1	5.819	INTRA-CHAIN
HIS A 21 NE2	ARG A 27 NH1	5.212	INTRA-CHAIN
HIS A 21 NE2	ASP B 55 OD1	-1.820	INTER-CHAIN
HIS A 21 NE2	HIS A 67 ND1	0.752	INTRA-CHAIN
HIS A 21 NE2	HIS A 67 NE2	1.758	INTRA-CHAIN
HIS A 21 NE2	ASP A 143 OD1	-2.270	INTRA-CHAIN
HIS A 21 NE2	HIS A 144 ND1	1.157	INTRA-CHAIN
HIS A 21 NE2	HIS A 144 NE2	2.725	INTRA-CHAIN
HIS A 21 NE2	HIS A 176 ND1	1.224	INTRA-CHAIN
HIS A 21 NE2	HIS A 176 NE2	2.639	INTRA-CHAIN
ARG A 22 NH1	HIS A 21 NE2	5.819	INTRA-CHAIN
ARG A 22 NH2	HIS A 21 NE2	7.041	INTRA-CHAIN
ARG A 27 NH1	HIS A 21 NE2	5.212	INTRA-CHAIN
ARG A 27 NH2	HIS A 21 NE2	5.171	INTRA-CHAIN
HIS A 67 ND1	HIS A 21 ND1	0.700	INTRA-CHAIN
HIS A 67 ND1	HIS A 21 NE2	1.691	INTRA-CHAIN
HIS A 67 NE2	HIS A 21 ND1	0.717	INTRA-CHAIN
HIS A 67 NE2	HIS A 21 NE2	1.758	INTRA-CHAIN
ASP A 143 OD1	HIS A 21 ND1	-2.396	INTRA-CHAIN
ASP A 143 OD2	HIS A 21 ND1	-2.489	INTRA-CHAIN
HIS A 144 ND1	HIS A 21 ND1	1.175	INTRA-CHAIN
HIS A 144 ND1	HIS A 21 NE2	2.604	INTRA-CHAIN
HIS A 144 NE2	HIS A 21 ND1	1.170	INTRA-CHAIN
HIS A 144 NE2	HIS A 21 NE2	2.725	INTRA-CHAIN
HIS A 176 ND1	HIS A 21 ND1	1.032	INTRA-CHAIN
HIS A 176 ND1	HIS A 21 NE2	2.754	INTRA-CHAIN
HIS A 176 NE2	HIS A 21 ND1	0.973	INTRA-CHAIN
HIS A 176 NE2	HIS A 21 NE2	2.639	INTRA-CHAIN
ASP B 55 OD1	HIS A 21 ND1	-2.012	INTER-CHAIN
ASP B 55 OD2	HIS A 21 ND1	-2.152	INTER-CHAIN

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Protrusion Index:
HIS A 21 N	0.06
HIS A 21 CA	0.03
HIS A 21 C	0.07
HIS A 21 O	0.09
HIS A 21 CB	0.06
HIS A 21 CG	0.15
HIS A 21 ND1	0.16
HIS A 21 CD2	0.23
HIS A 21 CE1	0.29
HIS A 21 NE2	0.35

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Van der Waal's Interactions:
SER A 19 OG 145	HIS A 21 NE2 160	-0.015	INTRA-CHAIN
HIS A 21 NE2 160	ARG A 22 NH2 171	-0.107	INTRA-CHAIN
HIS A 21 NE2 160	ARG A 27 NH2 212	-0.017	INTRA-CHAIN
HIS A 21 NE2 160	PHE A 48 CZ 368	-0.073	INTRA-CHAIN
HIS A 21 NE2 160	ILE B 54 CD1 411	-0.157	INTER-CHAIN