2I0U

Crystal structures of phospholipases A2 from Vipera nikolskii venom revealing Triton X-100 bound in hydrophobic channel

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	E, A	Basic subunit of heterodimer phospholipase A2	polymer	122	13829.8	2	UniProt (Q1RP79) Pfam (PF00068) In PDB	Vipera nikolskii	phospholipases A2
2	E	CALCIUM ION	non-polymer		40.1	2	Chemie (CA)
3	E, A	SULFATE ION	non-polymer		96.1	2	Chemie (SO4)
4	E, A	FRAGMENT OF TRITON X-100	non-polymer		352.5	2	Chemie (TRT)
5	A	trifluoroacetic acid	non-polymer		114.0	1	Chemie (TFA)
6		water	water		18.0	208	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	27659.5
Non-Polymers*	Number of molecules	7
	Total formula weight	1091.3
All*	Total formula weight	28750.9

*Water molecules are not included.