Structural features of residue 21 in chain B

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Electrostatic Interactions:
HIS A 45 ND1	ARG B 21 NH1	2.166	INTER-CHAIN
HIS A 55 ND1	ARG B 21 NH1	2.803	INTER-CHAIN
HIS A 55 NE2	ARG B 21 NH1	2.587	INTER-CHAIN
ARG B 21 NH1	HIS A 55 NE2	2.587	INTER-CHAIN
ARG B 21 NH1	HIS B 67 NE2	2.205	INTRA-CHAIN
ARG B 21 NH2	HIS A 55 NE2	2.184	INTER-CHAIN
ARG B 21 NH2	HIS B 67 NE2	2.121	INTRA-CHAIN
HIS B 67 ND1	ARG B 21 NH1	2.180	INTRA-CHAIN
HIS B 67 NE2	ARG B 21 NH1	2.205	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|       21|      B|         Q|       38|      A|
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Protrusion Index:
ARG B 21 N	0.65
ARG B 21 CA	0.68
ARG B 21 C	0.71
ARG B 21 O	0.59
ARG B 21 CB	0.98
ARG B 21 CG	1.17
ARG B 21 CD	1.00
ARG B 21 NE	0.69
ARG B 21 CZ	0.60
ARG B 21 NH1	0.40
ARG B 21 NH2	0.81

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Van der Waal's Interactions:
ARG B 21 NH2 2213	GLY B 26 O 2248	-0.041	INTRA-CHAIN
ARG B 21 NH2 2213	PRO A 39 CD 167	-0.011	INTER-CHAIN
ARG B 21 NH2 2213	LEU A 40 CD2 175	-0.383	INTER-CHAIN