Proton Translocation in Chloroplasts1 1Abbreviations used in this article: DPIP and DPIPH2, oxidized and reduced form of 2,6-dichlorophenolindophenol; DAD, 2,3,5,6-tetramethyl-p-phenylenediamine (diaminodurene); TMPD, N,N,N′,N′-tetramethyl-p-phenylenediamine; DMPD, N,N-dimethyl-p-phenylenediamine; PMS, N-methyl-phenazonium methosulfate; MV, methyl viologen (N,N′-dimethyl-4,4′-dipyridylium dichloride); AQ, anthraquinone-2-sulfonate; FCCP, carbonylcyanide-p-trifluoromethoxy-phenylhydrazone; DNP, 2,4-dinitroph