1EZU

ECOTIN Y69F, D70P BOUND TO D102N TRYPSIN

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B	ECOTIN	polymer	142	16086.5	2	UniProt (P23827) Pfam (PF03974) In PDB	Escherichia coli
2	C, D	TRYPSIN II, ANIONIC	polymer	223	23814.8	2	UniProt (P00763) Pfam (PF00089) In PDB	Rattus norvegicus (Norway rat)
3	C, D	CALCIUM ION	non-polymer		40.1	2	Chemie (CA)
4		water	water		18.0	42	Chemie (HOH)

Sequence modifications

A, B: 1 - 142 (UniProt: P23827)

PDB	External Database	Details
Phe 69	Tyr 89	engineered mutation
Pro 70	Asp 90	engineered mutation

C, D: 416 - 645 (UniProt: P00763)

PDB	External Database	Details
Asp 479	Asn 84	SEE REMARK 999
Asn 502	Asp 107	engineered mutation

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	79802.7
Non-Polymers*	Number of molecules	2
	Total formula weight	80.2
All*	Total formula weight	79882.9

*Water molecules are not included.