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ID of heme	Distortion Sort by saddling ruffling doming breathing	Axial ligands on heme		Function & structure
3abk-A-515	`sad. -0.74 ruf. +0.20 dom. +0.16 bre. -0.30`	HIS	chainID: A, resSeq: 61, molecule: Cytochrome c oxidase subunit 1	oxidoreductase oligomeric count: 13 pocket vol.: 539.0 Å³ d(Fe-oop): 0.023 Å
3abk-A-515	`sad. -0.74 ruf. +0.20 dom. +0.16 bre. -0.30`	HIS	chainID: A, resSeq: 378, molecule: Cytochrome c oxidase subunit 1
3abk-A-516	`sad. -0.42 ruf. -0.05 dom. +0.48 bre. -0.03`	HIS	chainID: A, resSeq: 376, molecule: Cytochrome c oxidase subunit 1	oxidoreductase oligomeric count: 13 pocket vol.: 673.0 Å³ d(Fe-oop): 0.194 Å
3abk-A-516	`sad. -0.42 ruf. -0.05 dom. +0.48 bre. -0.03`	NO	chainID: A, resSeq: 520, molecule: NITRIC OXIDE
3abk-N-515	`sad. -0.53 ruf. +0.22 dom. +0.18 bre. -0.43`	HIS	chainID: N, resSeq: 61, molecule: Cytochrome c oxidase subunit 1	oxidoreductase oligomeric count: 13 pocket vol.: 585.0 Å³ d(Fe-oop): 0.032 Å
3abk-N-515	`sad. -0.53 ruf. +0.22 dom. +0.18 bre. -0.43`	HIS	chainID: N, resSeq: 378, molecule: Cytochrome c oxidase subunit 1
3abk-N-516	`sad. -0.46 ruf. -0.08 dom. +0.50 bre. -0.09`	HIS	chainID: N, resSeq: 376, molecule: Cytochrome c oxidase subunit 1	oxidoreductase oligomeric count: 13 pocket vol.: 707.0 Å³ d(Fe-oop): 0.189 Å
3abk-N-516	`sad. -0.46 ruf. -0.08 dom. +0.50 bre. -0.09`	NO	chainID: N, resSeq: 520, molecule: NITRIC OXIDE