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Confirmed or potential roles for plastidial Grxs. Grxs of class I are depicted in white, and those of class II are in gray. When the reduction pathway is not clearly demonstrated, broken lines are used. GrxC5, GrxS14, and GrxS16 possibly oscillate between an apomonomer and a holodimer state binding an Fe-S cluster. Fdx, ferredoxin; FNR, ferredoxin:NADP+ reductase; FTR, ferredoxin-thioredoxin reductase; GR, glutathione reductase.
