3KUK

Trapping of an oxocarbenium ion intermediate in UP crystals

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B	Uridine phosphorylase	polymer	309	33923.0	2	UniProt (A5PJH9) Pfam (PF01048) In PDB	Bos taurus (bovine)
2	A, B	SULFATE ION	non-polymer		96.1	2	Chemie (SO4)
3	A, B	2'-DEOXYURIDINE	non-polymer		228.2	2	Chemie (DUR)
4		water	water		18.0	60	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	67846.0
Non-Polymers*	Number of molecules	4
	Total formula weight	648.5
All*	Total formula weight	68494.5

*Water molecules are not included.