Ferrodoxin, spinach

An interesting observation relating to the possible control of FDP cleavage in chloroplasts has been reported by Buchanan et al. 111). A latent FDPase present in spinach chloroplast extracts was shown to be specifically activated by reduced ferrodoxin. No other cofactors were required, which appeared to distinguish the latent FDPase from the alkaline FDPase studied by other workers. 

Fig. 13.11 Tlie Mossbauer spectra of oxidised and reduced spinach ferrodoxin at 4-6 K, showing the change in electronic configuration of only one of the iron atoms. [Ref. 27, Fig. 5]...

Numerous biological redox systems have been studied by the spectroelectrochemical approach, including cytochromes, myoglobin, photosynthetic electron transport components, spinach ferrodoxin, blue copper proteins, retinal, and vitamin B 2 analogues. Two classic examples are presented here. 

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