FIG. 3.

Domain arrangements of BphPs from examined strains (Agp1 and Agp2 from A. tumefaciens C58; RpBphP [gi 86749290] and RpBphP1 from R. palustris HaA2 and CGA009, respectively; BrBphP3 from Bradyrhizobium sp. ORS278; and Ppr from R. centenum SW). Domain arrangements were drawn according to PFAM results. The indicated domains are as follows: PAS, Per-Arnt-Sim; GAF, cGMP-specific and -regulated cyclic nucleotide phosphodiesterase, adenylyl cyclase, and E. coli transcription factor FhlA; PHY, phytochrome-specific; HisK, histidine kinase; and RR, response regulator. The chromophore binding site is indicated by the red line.