1TPO

THE GEOMETRY OF THE REACTIVE SITE AND OF THE PEPTIDE GROUPS IN TRYPSIN, TRYPSINOGEN AND ITS COMPLEXES WITH INHIBITORS

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A	BETA-TRYPSIN	polymer	223	23324.3	1	UniProt (P00760) Pfam (PF00089) In PDB	Bos taurus (cattle)
2	A	CALCIUM ION	non-polymer		40.1	1	Chemie (CA)
3		water	water		18.0	84	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	1
	Total formula weight	23324.3
Non-Polymers*	Number of molecules	1
	Total formula weight	40.1
All*	Total formula weight	23364.4

*Water molecules are not included.