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  • Title: Electron self-exchange in Pseudomonas cytochromes.
    Author: Timkovich R, Cai ML, Dixon DW.
    Journal: Biochem Biophys Res Commun; 1988 Feb 15; 150(3):1044-50. PubMed ID: 2829889.
    Abstract:
    Electron self-exchange has been measured by an NMR technique for cytochromes c551 from Pseudomonas aeruginosa and Pseudomonas stutzeri. The rate for P. aeruginosa cyt c551 is 1.2 x 10(7) M-1 s-1 at 40 degrees C in 50 mM phosphate at pH 7. For P. stutzeri, under the same conditions, the rate is 4 x 10(7) M-1 s-1. For both cytochromes, the rate was independent of ionic strength up to 0.5 M in added NaC1, the enthalpy of activation was 20 +/- 4 kcal mol-1, and the entropy of activation was 38 +/- 10 cal mol-1 deg-1.
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