Structural features of residue 18 in chain A

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Electrostatic Interactions:
HIS A 18 ND1	ARG B 13 NH1	2.500	INTER-CHAIN
HIS A 18 ND1	ASP B 28 OD1	-2.096	INTER-CHAIN
HIS A 18 ND1	ARG B 85 NH1	2.205	INTER-CHAIN
HIS A 18 NE2	ARG B 13 NH1	2.294	INTER-CHAIN
HIS A 18 NE2	ASP B 28 OD1	-1.987	INTER-CHAIN
HIS A 18 NE2	ARG B 85 NH1	2.562	INTER-CHAIN
ARG B 13 NH1	HIS A 18 NE2	2.294	INTER-CHAIN
ARG B 13 NH2	HIS A 18 NE2	2.734	INTER-CHAIN
ASP B 28 OD1	HIS A 18 ND1	-2.096	INTER-CHAIN
ASP B 28 OD2	HIS A 18 ND1	-2.525	INTER-CHAIN
ARG B 85 NH1	HIS A 18 NE2	2.562	INTER-CHAIN
ARG B 85 NH2	HIS A 18 NE2	3.096	INTER-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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|        H|       18|      A|         D|       44|      B|
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Protrusion Index:
HIS A 18 N	0.41
HIS A 18 CA	0.41
HIS A 18 C	0.62
HIS A 18 O	0.83
HIS A 18 CB	0.29
HIS A 18 CG	0.26
HIS A 18 ND1	0.32
HIS A 18 CD2	0.15
HIS A 18 CE1	0.34
HIS A 18 NE2	0.28

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Van der Waal's Interactions:
THR A 3 CG2 70	HIS A 18 NE2 187	-0.072	INTRA-CHAIN
HIS A 18 NE2 187	LEU A 19 CB 192	-0.015	INTRA-CHAIN
HIS A 18 NE2 187	GLN A 20 CB 197	-0.095	INTRA-CHAIN
HIS A 18 NE2 187	SER A 21 OG 203	-0.069	INTRA-CHAIN
HIS A 18 NE2 187	GLY B 37 O 320	-0.018	INTER-CHAIN
HIS A 18 NE2 187	PHE B 40 CZ 345	-0.013	INTER-CHAIN
HIS A 18 NE2 187	SER B 41 OG 351	-0.026	INTER-CHAIN