Structural features of residue 21 in chain A

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Electrostatic Interactions:
ARG A 4 NH1	HIS A 21 NE2	2.225	INTRA-CHAIN
HIS A 21 ND1	ARG A 4 NH1	2.409	INTRA-CHAIN
HIS A 21 ND1	ASP B 26 OD1	-2.424	INTER-CHAIN
HIS A 21 ND1	ASP B 31 OD1	-2.319	INTER-CHAIN
HIS A 21 ND1	ARG B 74 NH1	2.333	INTER-CHAIN
HIS A 21 NE2	ARG A 4 NH1	2.225	INTRA-CHAIN
HIS A 21 NE2	ASP B 26 OD1	-2.422	INTER-CHAIN
HIS A 21 NE2	ASP B 31 OD1	-2.645	INTER-CHAIN
ASP B 26 OD1	HIS A 21 ND1	-2.424	INTER-CHAIN
ASP B 26 OD2	HIS A 21 ND1	-2.762	INTER-CHAIN
ASP B 31 OD1	HIS A 21 ND1	-2.319	INTER-CHAIN
ASP B 31 OD2	HIS A 21 ND1	-2.789	INTER-CHAIN
ARG B 74 NH2	HIS A 21 NE2	2.191	INTER-CHAIN

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Protrusion Index:
HIS A 21 N	0.69
HIS A 21 CA	0.78
HIS A 21 C	0.72
HIS A 21 O	0.56
HIS A 21 CB	0.54
HIS A 21 CG	0.60
HIS A 21 ND1	0.54
HIS A 21 CD2	0.81
HIS A 21 CE1	0.80
HIS A 21 NE2	0.89

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Van der Waal's Interactions:
SER A 17 OG 129	HIS A 21 NE2 154	-0.018	INTRA-CHAIN
SER A 19 OG 140	HIS A 21 NE2 154	-0.035	INTRA-CHAIN
GLY A 20 O 144	HIS A 21 NE2 154	-0.141	INTRA-CHAIN
HIS A 21 NE2 154	ASP B 26 OD2 195	-0.010	INTER-CHAIN
HIS A 21 NE2 154	GLY B 30 O 217	-0.207	INTER-CHAIN
HIS A 21 NE2 154	ASP B 31 OD2 225	-0.018	INTER-CHAIN
HIS A 21 NE2 154	ALA B 33 CB 239	-0.035	INTER-CHAIN
HIS A 21 NE2 154	PRO B 34 CD 246	-0.025	INTER-CHAIN