Phylogenomic analysis of the Chlamydomonas genome unmasks proteins potentially involved in photosynthetic function and regulation.

For example, the flow of electrons to O 2 via the Mehler reaction (oxidation of ferredoxin) may be significant in generating a specific redox poise that modulates cyclic electron flow around photosystem (PS) I and the formation of ATP, the activity of PSII, state transitions, non-photochemical quenching, and even aspects of chloroplast biogenesis (Asada 1999 ; Heber 2002 ; Makino et al. 2002 ; Forti 2008 ).

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