Structural features of residue 21 in chain A

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Electrostatic Interactions:
ARG A 21 NH1	HIS B 41 NE2	6.605	INTER-CHAIN
ARG A 21 NH1	ARG B 59 NH1	3.158	INTER-CHAIN
ARG A 21 NH1	ARG B 59 NH2	2.967	INTER-CHAIN
ARG A 21 NH1	HIS A 116 NE2	2.524	INTRA-CHAIN
ARG A 21 NH1	HIS B 116 NE2	2.612	INTER-CHAIN
ARG A 21 NH2	ARG A 23 NH1	3.085	INTRA-CHAIN
ARG A 21 NH2	HIS B 41 NE2	5.487	INTER-CHAIN
ARG A 21 NH2	ARG B 59 NH1	3.497	INTER-CHAIN
ARG A 21 NH2	ARG B 59 NH2	3.268	INTER-CHAIN
ARG A 21 NH2	HIS A 116 NE2	2.429	INTRA-CHAIN
ARG A 21 NH2	HIS B 116 NE2	2.592	INTER-CHAIN
ARG A 23 NH1	ARG A 21 NH2	3.085	INTRA-CHAIN
HIS A 41 ND1	ARG A 21 NH1	2.279	INTRA-CHAIN
HIS A 116 ND1	ARG A 21 NH1	2.274	INTRA-CHAIN
HIS A 116 NE2	ARG A 21 NH1	2.524	INTRA-CHAIN
HIS B 41 ND1	ARG A 21 NH1	5.171	INTER-CHAIN
HIS B 41 NE2	ARG A 21 NH1	6.605	INTER-CHAIN
ARG B 59 NH1	ARG A 21 NH1	3.158	INTER-CHAIN
ARG B 59 NH1	ARG A 21 NH2	3.497	INTER-CHAIN
ARG B 59 NH2	ARG A 21 NH1	2.967	INTER-CHAIN
ARG B 59 NH2	ARG A 21 NH2	3.268	INTER-CHAIN
HIS B 105 ND1	ARG A 21 NH1	2.155	INTER-CHAIN
HIS B 116 ND1	ARG A 21 NH1	2.380	INTER-CHAIN
HIS B 116 NE2	ARG A 21 NH1	2.612	INTER-CHAIN

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Protrusion Index:
ARG A 21 N	0.52
ARG A 21 CA	0.63
ARG A 21 C	0.72
ARG A 21 O	0.58
ARG A 21 CB	0.81
ARG A 21 CG	0.97
ARG A 21 CD	1.13
ARG A 21 NE	1.19
ARG A 21 CZ	1.45
ARG A 21 NH1	1.37
ARG A 21 NH2	1.54

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Van der Waal's Interactions:
PHE A 17 CZ 138	ARG A 21 NH2 182	-0.035	INTRA-CHAIN
GLN A 18 NE2 147	ARG A 21 NH2 182	-0.134	INTRA-CHAIN
ARG A 21 NH2 182	HIS B 41 NE2 1421	-0.024	INTER-CHAIN