The phytochrome red/far-red photoreceptor superfamily

Table 1 Generalized properties of major groups of phytochromes

Group	Organisms	Approximate MW (kDa)	Chromophore	Pr λ_max (nm)	Pfr λ_max (nm)
Phy	Plants and green algae	120-130	PΦB	670	730
Cph	Cyanobacteria	80-115	PCB	650	705
Bph	Eubacteria	80-100	BV	700	750
Fph	Filamentous fungi	130-205	BV	705	760

Representative values for the properties are given to illustrate fundamental differences and similarities among these groups. Only a limited number of members of each group have been directly analyzed for their chromophore specificity and spectral properties. The molecular weight (MW) ranges reflect sequences currently available in public databases.

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