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. 1972 May;49(5):775-8.
doi: 10.1104/pp.49.5.775.

Terminal Oxidases of Chlorella pyrenoidosa

D F Sargent  1 , C P Taylor
Affiliations

Terminal Oxidases of Chlorella pyrenoidosa

D F Sargent et al. Plant Physiol. 1972 May.

Abstract

In studies of the kinetics of oxygen uptake by glucose-stimulated Chlorella pyrenoidosa, two terminal oxidases could be distinguished. The cytochrome oxidase of Chlorella has a Km (O(2)) of 2.1 +/- 0.3 mum, while the second oxidase has a Km (O(2)) of 6.7 +/- 0.5 mum, and a maximum capacity about one-quarter of that of the cytochrome system. The identity of the second oxidase is unknown, but it is not inhibited by carbon monoxide, 1 mm cyanide, 0.1 mm thiocyanate, or 1 mm 8-hydroxyquinoline. In fresh cultures, the second oxidase accounts for at most 35% of the total oxygen uptake.

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References

    1. Plant Physiol. 1949 Apr;24(2):255-64 - PubMed
    1. Plant Physiol. 1964 Jan;39(1):1-9 - PubMed
    1. Anal Biochem. 1971 Aug;42(2):446-54 - PubMed
    1. Plant Physiol. 1971 Jan;47(1):124-8 - PubMed

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