2ZPQ

Crystal structure of anionic trypsin isoform 1 from chum salmon

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B	Anionic trypsin	polymer	222	23877.8	2	UniProt (Q8AV11) Pfam (PF00089) In PDB	Oncorhynchus keta (Chum salmon)
2	A	SULFATE ION	non-polymer		96.1	2	Chemie (SO4)
3	A, B	CALCIUM ION	non-polymer		40.1	2	Chemie (CA)
4	A, B	BENZAMIDINE	non-polymer		120.2	2	Chemie (BEN)
5		water	water		18.0	292	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	47755.6
Non-Polymers*	Number of molecules	6
	Total formula weight	512.6
All*	Total formula weight	48268.2

*Water molecules are not included.