2P04

2.1 Ang structure of the dimerized PAS domain of signal transduction histidine kinase from Nostoc punctiforme PCC 73102 with homology to the H-NOXA/H-NOBA domain of the soluble guanylyl cyclase

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)	signal transduction histidine kinase	polymer	121	13870.2	2	Pfam (PF07701) UniProt (by SIFTS) (D0VWX5)	Nostoc punctiforme
2	C, D (A, B)	water	water		18.0	55	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	27740.5
All*	Total formula weight	27740.5

*Water molecules are not included.