1QHE

ENERGETICS OF A HYDROGEN BOND (CHARGED AND NEUTRAL) AND OF A CATION-PI INTERACTION IN APOFLAVODOXIN

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A	PROTEIN (FLAVODOXIN)	polymer	168	18760.4	1	UniProt (P0A3E0) Pfam (PF00258) In PDB	Nostoc sp.
2	A	SULFATE ION	non-polymer		96.1	1	Chemie (SO4)
3		water	water		18.0	90	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	1
	Total formula weight	18760.4
Non-Polymers*	Number of molecules	1
	Total formula weight	96.1
All*	Total formula weight	18856.5

*Water molecules are not included.