4P3R

Cryogenic WT DHFR, time-averaged ensemble

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A	Dihydrofolate reductase	polymer	159	18019.3	1	UniProt (B1XC49) In PDB	Escherichia coli
2	A	FOLIC ACID	non-polymer		441.4	1	Chemie (FOL)
3	A	NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE	non-polymer		743.4	1	Chemie (NAP)
4		water	water		18.0	200	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	1
	Total formula weight	18019.3
Non-Polymers*	Number of molecules	2
	Total formula weight	1184.8
All*	Total formula weight	19204.1

*Water molecules are not included.