Structural features of residue 21 in chain B

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Electrostatic Interactions:
ARG A 20 NH2	ARG B 21 NH1	3.372	INTER-CHAIN
ARG B 20 NH1	ARG B 21 NH1	5.544	INTRA-CHAIN
ARG B 20 NH1	ARG B 21 NH2	4.520	INTRA-CHAIN
ARG B 20 NH2	ARG B 21 NH1	4.745	INTRA-CHAIN
ARG B 20 NH2	ARG B 21 NH2	4.089	INTRA-CHAIN
ARG B 21 NH1	ARG B 20 NH1	5.544	INTRA-CHAIN
ARG B 21 NH1	ARG B 20 NH2	4.745	INTRA-CHAIN
ARG B 21 NH1	ARG A 20 NH2	3.372	INTER-CHAIN
ARG B 21 NH1	HIS B 51 NE2	2.955	INTRA-CHAIN
ARG B 21 NH2	ARG B 20 NH1	4.520	INTRA-CHAIN
ARG B 21 NH2	ARG B 20 NH2	4.089	INTRA-CHAIN
ARG B 21 NH2	HIS B 51 NE2	2.817	INTRA-CHAIN
HIS B 51 ND1	ARG B 21 NH1	3.097	INTRA-CHAIN
HIS B 51 NE2	ARG B 21 NH1	2.955	INTRA-CHAIN

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Protrusion Index:
ARG B 21 N	0.12
ARG B 21 CA	0.12
ARG B 21 C	0.21
ARG B 21 O	0.18
ARG B 21 CB	0.16
ARG B 21 CG	0.09
ARG B 21 CD	-0.03
ARG B 21 NE	0.09
ARG B 21 CZ	0.16
ARG B 21 NH1	0.20
ARG B 21 NH2	0.32

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Salt bridges:
ASP B 17	ARG B 21	3.055	INTRA-CHAIN
ARG B 20	ARG B 21	2.847	INTRA-CHAIN

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Van der Waal's Interactions:
PRO A 5 CD 41	ARG B 21 NH2 895	-0.036	INTER-CHAIN
LEU A 8 CD2 67	ARG B 21 NH2 895	-0.022	INTER-CHAIN
ASN A 9 ND2 75	ARG B 21 NH2 895	-0.087	INTER-CHAIN
PRO B 18 CD 866	ARG B 21 NH2 895	-0.109	INTRA-CHAIN