Structural features of residue 21 in chain A

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Electrostatic Interactions:
GLU A 18 OE1	ASP A 21 OD2	8.128	INTRA-CHAIN
GLU A 18 OE2	ASP A 21 OD2	7.445	INTRA-CHAIN
ASP A 21 OD1	GLU A 18 OE1	5.843	INTRA-CHAIN
ASP A 21 OD1	ASP A 96 OD1	2.876	INTRA-CHAIN
ASP A 21 OD1	ASP A 101 OD1	5.511	INTRA-CHAIN
ASP A 21 OD1	ASP A 101 OD2	6.823	INTRA-CHAIN
ASP A 21 OD1	HIS B 112 ND1	-2.442	INTER-CHAIN
ASP A 21 OD1	HIS A 112 ND1	-1.366	INTRA-CHAIN
ASP A 21 OD2	GLU A 18 OE1	8.128	INTRA-CHAIN
ASP A 21 OD2	GLU A 37 OE1	2.833	INTRA-CHAIN
ASP A 21 OD2	ASP A 101 OD1	4.382	INTRA-CHAIN
ASP A 21 OD2	ASP A 101 OD2	5.327	INTRA-CHAIN
ASP A 21 OD2	HIS B 112 ND1	-2.145	INTER-CHAIN
GLU A 37 OE1	ASP A 21 OD2	2.833	INTRA-CHAIN
ASP A 96 OD1	ASP A 21 OD1	2.876	INTRA-CHAIN
ASP A 101 OD1	ASP A 21 OD1	5.511	INTRA-CHAIN
ASP A 101 OD1	ASP A 21 OD2	4.382	INTRA-CHAIN
ASP A 101 OD2	ASP A 21 OD1	6.823	INTRA-CHAIN
ASP A 101 OD2	ASP A 21 OD2	5.327	INTRA-CHAIN
HIS A 112 ND1	ASP A 21 OD1	-1.366	INTRA-CHAIN
HIS B 112 ND1	ASP A 21 OD1	-2.442	INTER-CHAIN
HIS B 112 NE2	ASP A 21 OD1	-2.020	INTER-CHAIN

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Protrusion Index:
ASP A 21 N	0.42
ASP A 21 CA	0.57
ASP A 21 C	0.51
ASP A 21 O	0.58
ASP A 21 CB	0.83
ASP A 21 CG	1.08
ASP A 21 OD1	1.19
ASP A 21 OD2	1.32

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Salt bridges:
ASP A 21	ARG A 22	2.250	INTRA-CHAIN

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Van der Waal's Interactions:
ALA A 17 CB 114	ASP A 21 OD2 146	-0.089	INTRA-CHAIN
GLU A 18 OE2 123	ASP A 21 OD2 146	-0.037	INTRA-CHAIN
GLY A 20 O 138	ASP A 21 OD2 146	-0.022	INTRA-CHAIN
ASP A 21 OD2 146	ARG A 35 NH2 258	-0.036	INTRA-CHAIN