Photo-inactivation of system II centers by carbonyl cyanide m-chlorophenylhydrazone in Chlorella pyrenoidosa.
In the presence of a high concentration of carbonyl cyanide m-chlorophenylhydrazone (CCCP) (4-10(-6) M), the S2 and S3 dark decays are accelerated and become biphasic with a first half-time of 0.6 s. The first fast phase of the decays does not correspond to a simple reduction of S2, S3 back to S0, S1 (i.e. to an acceleration of the deactivation reaction), but to a decrease in the number of oxygen-evolving System II centers. This photo-inactivation produced by CCCP is rapidly reversible in the dark.
D002258:Carbonyl Cyanide m-Chlorophenyl Hydrazone / Q000494:pharmacology*; D002708:Chlorella / Q000187:drug effects / Q000378:metabolism*; D003624:Darkness; D007700:Kinetics; D008027:Light; D009570:Nitriles / Q000494:pharmacology*; D010100:Oxygen / Q000378:metabolism; D010785:Photophosphorylation / Q000187:drug effects*
D009570:Nitriles; D002258:Carbonyl Cyanide m-Chlorophenyl Hydrazone; D010100:Oxygen