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ID of heme	Distortion Sort by saddling ruffling doming breathing	Axial ligands on heme		Function & structure
2frk-X-154	`sad. -0.01 ruf. +0.03 dom. -0.23 bre. -0.27`	HIS	chainID: X, resSeq: 93, molecule: Myoglobin	oxygen carrier oligomeric count: 1 pocket vol.: 527.0 Å³ d(Fe-oop): 0.128 Å
2frk-X-154	`sad. -0.01 ruf. +0.03 dom. -0.23 bre. -0.27`	NO	chainID: X, resSeq: 155, molecule: NITRIC OXIDE