1GTP

GTP CYCLOHYDROLASE I

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B, C, D, E... (A, B, C, D, E...)	GTP CYCLOHYDROLASE I	polymer	221	24733.5	20	UniProt (P0A6T5) Pfam (PF01227)	Escherichia coli
2	AA, BA, CA, DA, EA... (G, H, I, J, K...)	SULFATE ION	non-polymer		96.1	20	Chemie (SO4)
3	AB, BB, CB, DB, EB... (M, N, O, P, Q...)	water	water		18.0	320	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	20
	Total formula weight	494669.0
Non-Polymers*	Number of molecules	20
	Total formula weight	1921.3
All*	Total formula weight	496590.3

*Water molecules are not included.