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Figure 5 | BMC Research Notes

Figure 5

From: Streptophyte phytochromes exhibit an N-terminus of cyanobacterial origin and a C-terminus of proteobacterial origin

Figure 5

Cartoon representation of major events during the evolution of streptophyte phytochromes. D indicates the duplication of phytochrome genes that gave rise to A- and B-type phytochromes. X indicates loss of A-type phytochromes; R indicates the rearrangement of PGP and PAS/PAS/HK in the evolution of gymnosperm P-type phytochromes. Secondary endosymbiosis is indicated by the curved arrow. The overall domain arrangement of diatom (heterokont, left) and streptophyte phytochrome is also shown.

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