1A4X

PYRR, THE BACILLUS SUBTILIS PYRIMIDINE BIOSYNTHETIC OPERON REPRESSOR, HEXAMERIC FORM

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B	PYRIMIDINE OPERON REGULATORY PROTEIN PYRR	polymer	181	20290.3	2	UniProt (P39765) Pfam (PF00156) In PDB	Bacillus subtilis	PYRR
2	A, B	SULFATE ION	non-polymer		96.1	2	Chemie (SO4)
3		water	water		18.0	237	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	40580.6
Non-Polymers*	Number of molecules	2
	Total formula weight	192.1
All*	Total formula weight	40772.7

*Water molecules are not included.