4NU3

Crystal structure of mFfIBP, a capping head region swapped mutant of ice-binding protein

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)	ice-binding protein	polymer	255	26339.3	2	Pfam (PF11999) UniProt (by SIFTS) (H7FWB6)	Flavobacterium frigoris PS1
2	C, D, E, F (A, B)	SULFATE ION	non-polymer		96.1	4	Chemie (SO4)
3	G (B)	SODIUM ION	non-polymer		23.0	1	Chemie (NA)
4	H, I (A, B)	water	water		18.0	621	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	52678.6
Non-Polymers*	Number of molecules	5
	Total formula weight	407.2
All*	Total formula weight	53085.8

*Water molecules are not included.