Localization and Nature of Phenolase in Sugar-beet Leaves

Phenolase activity has been found in chloroplast, mitochondrial, and soluble fractions of homogenates prepared from sugar-beet leaves. The phenolases present in the three fractions have different catecholase/cresolase ratios and respond differently to inhibitors. The chloroplasts contain about half...

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Bibliographic Details
Published in:Journal of experimental botany 1960-05, Vol.11 (2), p.141-150
Main Authors: MAYER, A. M., FRIEND, J.
Format: Article
Language:English
Subjects:
Catechols
Chloroplasts
Cresols
Cyanides
Enzymes
Leaves
Mitochondria
Oxidation
Oxygen
Phenols
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Summary:Phenolase activity has been found in chloroplast, mitochondrial, and soluble fractions of homogenates prepared from sugar-beet leaves. The phenolases present in the three fractions have different catecholase/cresolase ratios and respond differently to inhibitors. The chloroplasts contain about half the cresolase activity of a leaf homogenate, whereas the bulk of the catecholase activity is present in the soluble fraction. The findings are discussed in relation to the possible mode of action of catecholase and cresolase.
ISSN:0022-0957
1460-2431
DOI:10.1093/jxb/11.2.141