electron transfer activity plastoquinol--plastocyanin reductase activity https://github.com/geneontology/go-ontology/issues/19015 https://github.com/geneontology/go-ontology/issues/30193 MetaCyc:PLASTOQUINOL--PLASTOCYANIN-REDUCTASE-RXN Catalysis of the reaction: 2 H+[side 1] + 2 oxidized plastocyanin + plastoquinol-1 = 2 H+[side 2] + 2 reduced plastocyanin + plastoquinone. This reaction involves the concomitant transfer of 2 H+ ions across a membrane. KEGG_REACTION:R03817 plastoquinol/plastocyanin oxidoreductase activity plastoquinol:oxidized-plastocyanin oxidoreductase activity plastoquinol-plastocyanin reductase activity cytochrome b6f molecular_function RHEA:22148 cytochrome b6f complex activity EC:7.1.1.6 GO:0009496 oxidoreduction-driven active transmembrane transporter activity oxidoreductase activity, acting on diphenols and related substances as donors, with copper protein as acceptor