Figure 1From: Streptophyte phytochromes exhibit an N-terminus of cyanobacterial origin and a C-terminus of proteobacterial originDomain arrangements of phytochromes and bacterial multi-PAS histidine kinases. The PFAM [79] domain names are given under each bar; the ranges of PGP and HK are indicated above the bars; RR, response regulator. The position of the chromophore-binding Cys residue is indicated by a vertical red bar. Accession numbers for phytochromes are given in Additional file 3.Back to article page