POLYPHENOL OXIDASE ACTIVITY AND THE METABOLISM OF GLYCINE BY POTATO TUBER SLICES
نویسندگان
چکیده
منابع مشابه
Metabolism of dehydroisoandrosterone and other steroids by surviving slices of the potato tuber and additional plant tissues.
The conversion of dehydroisoandrosterone to its ,B-D-glucopyranoside is readily effected by surviving slices of the potato tuber at pH 8. This reaction is largely limited to dehydroisoandrosterone and isoandrosterone, and is slowly reversed at pH 4 as the result of weak P-glucosidase-like activity. Potatoes also contain an active /?-glucuronidase which differs from known preparations in possess...
متن کاملActivation of protein synthesis in aging potato tuber slices.
LiCI-extraction of RNAs from isolated ribosomes, however, destroys the coding properties of mRNAs (as has been shown with cerebral mRNA; P. MANDEL, pers. comm.). Therefore separation of mRNAs from ribosomes was achieved by EDTA. If isolated ribosomes from intact potato tubers are dissociated into subunits and RNAs by EDTA, sucrose density gradient profiles show the presence of the 60Sand 40S-su...
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and petiole, the interveinal tissue did not reach tritium equality with major veins, the stem, or the external solution. Water of the interveinal tissue maintained a stable tritium content at 60 to 70 % of external concentration for long periods. The pattern of results obtained was similar in sunflower and tobacco. Tritium content of leaf-tissue water vapor transpired by the canopy of an intact...
متن کاملChanges in sucrose synthetase activities in aging potato tuber slices.
The me-chanism by which the reversible conversion of starch ito sucrose takes place in potato tubers exposed t,o cold is as yet essentilally unknown. Early 'studies on the subjectt tried to correllate this conversion with va,riations in the activity of related enzymes (10). Those responsible for the synthesis of sucrose and sticrose-6--phosphiate (1) are undoubtedly highly relevant. In add'itio...
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The electrochemistry of banana tissues on a carbon paste electrode modified with multi-walled carbon nanotubes (MWCNTs) is presented. Cyclic voltammetry is applied to investigate the direct electrochemistry of banana tissues i.e. a source of polyphenol oxidase (PPO). A redox couple with an anodic and counterpart cathodic peak is obtained. The influence of various parameters such as pH,...
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ژورنال
عنوان ژورنال: New Phytologist
سال: 1967
ISSN: 0028-646X,1469-8137
DOI: 10.1111/j.1469-8137.1967.tb06014.x