5YCI

Ancestral myoglobin aMbWb' of Basilosaurus relative (polyphyly)

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B	Ancestral myoglobin aMbWb' of Basilosaurus relative (polyphyly)	polymer	157	17467.1	2	Pfam (PF00042) UniProt (by SIFTS) (R9RZK8) In PDB	Physeter catodon
2	A, B	PROTOPORPHYRIN IX CONTAINING FE	non-polymer		616.5	2	Chemie (HEM)
3		water	water		18.0	345	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	34934.3
Non-Polymers*	Number of molecules	2
	Total formula weight	1233.0
All*	Total formula weight	36167.2

*Water molecules are not included.