Structural features of residue 21 in chain B

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Electrostatic Interactions:
HIS B 21 ND1	ASP B 28 OD1	-1.831	INTRA-CHAIN
HIS B 21 ND1	ARG B 64 NH1	2.436	INTRA-CHAIN
HIS B 21 ND1	ARG B 110 NH1	3.138	INTRA-CHAIN
HIS B 21 NE2	ASP B 28 OD1	-2.004	INTRA-CHAIN
HIS B 21 NE2	ARG B 64 NH1	2.813	INTRA-CHAIN
HIS B 21 NE2	ARG B 110 NH1	3.665	INTRA-CHAIN
ASP B 28 OD1	HIS B 21 ND1	-1.831	INTRA-CHAIN
ASP B 28 OD2	HIS B 21 ND1	-1.959	INTRA-CHAIN
ARG B 64 NH1	HIS B 21 NE2	2.813	INTRA-CHAIN
ARG B 64 NH2	HIS B 21 NE2	3.445	INTRA-CHAIN
ARG B 110 NH1	HIS B 21 NE2	3.665	INTRA-CHAIN
ARG B 110 NH2	HIS B 21 NE2	3.401	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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|        R|      140|      C|         H|       21|      B|
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Protrusion Index:
HIS B 21 N	0.62
HIS B 21 CA	0.67
HIS B 21 C	0.75
HIS B 21 O	0.58
HIS B 21 CB	0.62
HIS B 21 CG	0.67
HIS B 21 ND1	0.95
HIS B 21 CD2	0.59
HIS B 21 CE1	1.04
HIS B 21 NE2	0.75

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Van der Waal's Interactions:
ALA B 20 CB 138	HIS B 21 NE2 148	-0.112	INTRA-CHAIN
HIS B 21 NE2 148	SER C 139 OG 986	-0.086	INTER-CHAIN