3FCA

Genetic Incorporation of a Metal-ion Chelating Amino Acid into proteins as biophysical probe

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B (A, B)	Cysteine synthase	polymer	291	31237.4	2		Thermus thermophilus	TM0665
2	C, D (A, B)	ZINC ION	non-polymer		65.4	2	Chemie (ZN)
3	E, F (A, B)	water	water		18.0	164	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	62474.7
Non-Polymers*	Number of molecules	2
	Total formula weight	130.8
All*	Total formula weight	62605.5

*Water molecules are not included.