Dual-Cys bacteriophytochromes: intermediates in cyanobacterial phytochrome evolution?

This work (Yang et al., "Dual-Cys bacteriophytochromes: intermediates in cyanobacterial phytochrome evolution?" in FEBS. J.) involves the characterization of new cyanobacterial phytochrome photoreceptor proteins and engineering chromophore preferences via Cysteine mutagenesis both in those proteins and in known reference proteins. Proteins were characterized using absorption and mass spectrometry, phylogenetic analysis, and X-ray crystallography. The crystal structure is available through the RCSB PDB (PDB ID: 9JRY). All other data are in this deposit.