4PYJ

human apo-COMT, single domain swap

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A	Catechol O-methyltransferase	polymer	221	24478.1	1	UniProt (P21964) Pfam (PF01596) In PDB	Homo sapiens (human)
2	A	SODIUM ION	non-polymer		23.0	1	Chemie (NA)
3	A	MAGNESIUM ION	non-polymer		24.3	1	Chemie (MG)
4	A	CHLORIDE ION	non-polymer		35.5	1	Chemie (CL)
5		water	water		18.0	71	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	1
	Total formula weight	24478.1
Non-Polymers*	Number of molecules	3
	Total formula weight	82.7
All*	Total formula weight	24560.8

*Water molecules are not included.