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Purification of the enzyme NADPH: protochlorophyllide oxidoreductase.


ABSTRACT: A procedure for the purification of the enzyme NADPH:protochlorophyllide oxidoreductase is described. This involves fractionation of sonicated oat etioplast membranes by discontinuous-sucrose-density-gradient centrifugation, which gives membranes in which the enzyme is present at a high specific activity. The enzyme is solubilized from the membranes with Triton X-100, followed by gel filtration of the extract; enzyme activity is eluted in fractions corresponding to a mol.wt of approx. 35000. Sodium dodecyl sulphate/polyacrylamide-gel electrophoresis of the enzyme-containing fractions from gel filtration shows two peptides, of mol.wts. approx. 35000 and 37000.

SUBMITTER: Beer NS 

PROVIDER: S-EPMC1162857 | biostudies-other | 1981 Apr

REPOSITORIES: biostudies-other

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