Structural features of residue 21 in chain B

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Electrostatic Interactions:
ASP A 23 OD1	ASP B 21 OD1	2.739	INTER-CHAIN
ASP A 23 OD2	ASP B 21 OD1	2.776	INTER-CHAIN
GLU A 60 OE1	ASP B 21 OD2	5.667	INTER-CHAIN
GLU A 60 OE2	ASP B 21 OD2	4.597	INTER-CHAIN
GLU A 67 OE1	ASP B 21 OD2	2.721	INTER-CHAIN
GLU A 67 OE2	ASP B 21 OD2	3.053	INTER-CHAIN
GLU A 76 OE1	ASP B 21 OD2	3.360	INTER-CHAIN
GLU A 76 OE2	ASP B 21 OD2	3.113	INTER-CHAIN
HIS A 84 ND1	ASP B 21 OD1	-1.533	INTER-CHAIN
HIS A 84 NE2	ASP B 21 OD1	-1.502	INTER-CHAIN
GLU B 15 OE1	ASP B 21 OD2	2.926	INTRA-CHAIN
GLU B 15 OE2	ASP B 21 OD2	2.975	INTRA-CHAIN
ASP B 21 OD1	GLU B 15 OE1	2.780	INTRA-CHAIN
ASP B 21 OD1	ASP A 23 OD1	2.739	INTER-CHAIN
ASP B 21 OD1	ASP A 23 OD2	2.776	INTER-CHAIN
ASP B 21 OD1	ASP B 23 OD1	4.282	INTRA-CHAIN
ASP B 21 OD1	ASP B 23 OD2	4.679	INTRA-CHAIN
ASP B 21 OD1	GLU A 60 OE1	4.498	INTER-CHAIN
ASP B 21 OD1	GLU A 76 OE1	2.953	INTER-CHAIN
ASP B 21 OD1	HIS A 84 ND1	-1.533	INTER-CHAIN
ASP B 21 OD2	GLU B 15 OE1	2.926	INTRA-CHAIN
ASP B 21 OD2	ASP B 23 OD1	3.791	INTRA-CHAIN
ASP B 21 OD2	ASP B 23 OD2	3.991	INTRA-CHAIN
ASP B 21 OD2	GLU A 60 OE1	5.667	INTER-CHAIN
ASP B 21 OD2	GLU A 67 OE1	2.721	INTER-CHAIN
ASP B 21 OD2	GLU A 76 OE1	3.360	INTER-CHAIN
ASP B 21 OD2	HIS A 84 ND1	-1.646	INTER-CHAIN
ASP B 23 OD1	ASP B 21 OD1	4.282	INTRA-CHAIN
ASP B 23 OD1	ASP B 21 OD2	3.791	INTRA-CHAIN
ASP B 23 OD2	ASP B 21 OD1	4.679	INTRA-CHAIN
ASP B 23 OD2	ASP B 21 OD2	3.991	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|       31|      A|         D|       21|      B|
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|        R|       61|      A|         D|       21|      B|
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Protrusion Index:
ASP B 21 N	0.06
ASP B 21 CA	0.04
ASP B 21 C	0.09
ASP B 21 O	0.04
ASP B 21 CB	0.04
ASP B 21 CG	-0.00
ASP B 21 OD1	-0.02
ASP B 21 OD2	-0.04

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Salt bridges:
ASP B 21	ARG A 31	2.668	INTER-CHAIN
ASP B 21	ARG A 61	2.770	INTER-CHAIN

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Van der Waal's Interactions:
ILE B 17 CD1 846	ASP B 21 OD2 881	-0.015	INTRA-CHAIN
ASP B 21 OD2 881	ILE B 24 CD1 905	-0.013	INTRA-CHAIN
ASP B 21 OD2 881	ARG A 31 NH2 241	-1.247	INTER-CHAIN
ASP B 21 OD2 881	MET A 57 CE 380	-0.296	INTER-CHAIN
ASP B 21 OD2 881	ARG A 61 NH2 415	-1.981	INTER-CHAIN
ASP B 21 OD2 881	PHE A 79 CZ 558	-0.063	INTER-CHAIN
ASP B 21 OD2 881	ILE A 82 CD1 580	-0.008	INTER-CHAIN
ASP B 21 OD2 881	ILE A 83 CD1 588	-0.043	INTER-CHAIN