Structural features of residue 21 in chain B

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Electrostatic Interactions:
ARG A 3 NH1	ARG B 21 NH1	2.985	INTER-CHAIN
ARG A 3 NH2	ARG B 21 NH1	3.244	INTER-CHAIN
ARG A 3 NH2	ARG B 21 NH2	3.174	INTER-CHAIN
ARG B 21 NH1	ARG A 3 NH1	2.985	INTER-CHAIN
ARG B 21 NH1	ARG A 3 NH2	3.244	INTER-CHAIN
ARG B 21 NH1	HIS B 34 NE2	2.161	INTRA-CHAIN
ARG B 21 NH1	ARG B 36 NH1	3.555	INTRA-CHAIN
ARG B 21 NH1	ARG B 36 NH2	3.767	INTRA-CHAIN
ARG B 21 NH1	ARG B 250 NH1	3.001	INTRA-CHAIN
ARG B 21 NH1	HIS B 256 NE2	2.555	INTRA-CHAIN
ARG B 21 NH2	ARG A 3 NH2	3.174	INTER-CHAIN
ARG B 21 NH2	ARG B 36 NH1	3.493	INTRA-CHAIN
ARG B 21 NH2	ARG B 36 NH2	3.773	INTRA-CHAIN
ARG B 21 NH2	HIS B 256 NE2	2.370	INTRA-CHAIN
HIS B 34 ND1	ARG B 21 NH1	2.161	INTRA-CHAIN
HIS B 34 NE2	ARG B 21 NH1	2.161	INTRA-CHAIN
ARG B 36 NH1	ARG B 21 NH1	3.555	INTRA-CHAIN
ARG B 36 NH1	ARG B 21 NH2	3.493	INTRA-CHAIN
ARG B 36 NH2	ARG B 21 NH1	3.767	INTRA-CHAIN
ARG B 36 NH2	ARG B 21 NH2	3.773	INTRA-CHAIN
ARG B 250 NH1	ARG B 21 NH1	3.001	INTRA-CHAIN
HIS B 256 ND1	ARG B 21 NH1	2.440	INTRA-CHAIN
HIS B 256 NE2	ARG B 21 NH1	2.555	INTRA-CHAIN

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Protrusion Index:
ARG B 21 N	0.39
ARG B 21 CA	0.54
ARG B 21 C	0.54
ARG B 21 O	0.69
ARG B 21 CB	0.57
ARG B 21 CG	0.64
ARG B 21 CD	0.39
ARG B 21 NE	0.38
ARG B 21 CZ	0.28
ARG B 21 NH1	0.25
ARG B 21 NH2	0.44

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Van der Waal's Interactions:
SER A 6 OG 49	ARG B 21 NH2 2322	-0.193	INTER-CHAIN
GLY B 18 O 2294	ARG B 21 NH2 2322	-0.012	INTRA-CHAIN
GLN B 20 NE2 2311	ARG B 21 NH2 2322	-0.056	INTRA-CHAIN
ARG B 21 NH2 2322	LEU A 92 CD2 689	-0.132	INTER-CHAIN