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ID of heme	Distortion Sort by saddling ruffling doming breathing	Axial ligands on heme		Function & structure
4xyd-A-501	`sad. +0.00 ruf. +0.66 dom. +0.25 bre. +0.04`	HIS	chainID: A, resSeq: 53, molecule: Nitric-oxide reductase subunit B	oxidoreductase oligomeric count: 2 pocket vol.: 389.0 Å³ d(Fe-oop): 0.004 Å
4xyd-A-501	`sad. +0.00 ruf. +0.66 dom. +0.25 bre. +0.04`	HIS	chainID: A, resSeq: 336, molecule: Nitric-oxide reductase subunit B
4xyd-A-504	`sad. -0.26 ruf. +1.14 dom. +0.26 bre. +0.01`	HIS	chainID: A, resSeq: 334, molecule: Nitric-oxide reductase subunit B	oxidoreductase oligomeric count: 2 pocket vol.: 394.0 Å³ d(Fe-oop): 0.014 Å
4xyd-A-504	`sad. -0.26 ruf. +1.14 dom. +0.26 bre. +0.01`	UNL	chainID: A, resSeq: 502, molecule: UNKNOWN LIGAND
4xyd-B-201	`sad. +0.01 ruf. -0.02 dom. -0.01 bre. -0.58`	HIS	chainID: B, resSeq: 66, molecule: NorC-like protein	oxidoreductase oligomeric count: 2 pocket vol.: 327.0 Å³ d(Fe-oop): 0.001 Å
4xyd-B-201	`sad. +0.01 ruf. -0.02 dom. -0.01 bre. -0.58`	MET	chainID: B, resSeq: 116, molecule: NorC-like protein