3JU5

Crystal Structure of Dimeric Arginine Kinase at 1.75-A Resolution

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	Arginine kinase	polymer	370	42772.4	4	UniProt (Q9XY07) Pfam (PF02807) Pfam (PF00217) In PDB	Apostichopus japonicus (Sea cucumber)	AK
2	A, C	MAGNESIUM ION	non-polymer		24.3	2	Chemie (MG)
3		water	water		18.0	1711	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	171089.7
Non-Polymers*	Number of molecules	2
	Total formula weight	48.6
All*	Total formula weight	171138.3

*Water molecules are not included.