Cytochrome f and plastocyanin: their sequence in the photosynthetic electron transport chain of Chlamydomonas reinhardi.

Abstract

Evidence is presented from experiments with 2 different mutant strains of C. reinhardi, one of which lacks plastccyanin and the other, cytochrome f, that: (1) plastocyanin and cytochrome f lie in series rather than in parallel in the photosynthetic electron transport chain; (2) the sequence of plastocyanin and cytochrome f in the electron transport chain is system H-cytochrome f-plastocyanin-system I; and (3) a site of photosynthetic phosphorylation is on the system I side of cytochrome f and possibly on the system I side of plastocyanin.