Structural features of residue 21 in chain A

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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|      255|      B|         Q|       21|      A|
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Van der Waal's Interactions:
GLU A 17 OE2 94	GLN A 21 NE2 126	-0.018	INTRA-CHAIN
GLN A 21 NE2 126	TYR A 39 OH 256	-0.077	INTRA-CHAIN
GLN A 21 NE2 126	THR A 222 CG2 1526	-0.316	INTRA-CHAIN
GLN A 21 NE2 126	ALA A 233 CB 1608	-0.025	INTRA-CHAIN
GLN A 21 NE2 126	TYR A 235 OH 1628	-1.112	INTRA-CHAIN
GLN A 21 NE2 126	LEU B 254 CD2 3834	-0.839	INTER-CHAIN
GLN A 21 NE2 126	GLY B 258 O 3867	-0.114	INTER-CHAIN