1SA3

An asymmetric complex of restriction endonuclease MspI on its palindromic DNA recognition site

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 (C, D, E, F)	5'-D(*CP*CP*CP*CP*CP*GP*GP*GP*GP*G)-3'	polymer	10	3047.0	4
2	E, F (A, B)	Type II restriction enzyme MspI	polymer	262	29876.0	2	UniProt (P11405) Pfam (PF09208)	Moraxella sp.	Endonuclease MspI, R.MspI
3	G, H (A, B)	SODIUM ION	non-polymer		23.0	2	Chemie (NA)
4	I, J, K, L, M... (C, D, E, F, A...)	water	water		18.0	331	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	6
	Total formula weight	71939.9
Non-Polymers*	Number of molecules	2
	Total formula weight	46.0
All*	Total formula weight	71985.9

*Water molecules are not included.