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.
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Research Article| April 01 1981
Purification of the enzyme NADPH: protochlorophyllide oxidoreductase
Biochem J (1981) 195 (1): 83–92.
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N S Beer, W T Griffiths; Purification of the enzyme NADPH: protochlorophyllide oxidoreductase. Biochem J 1 April 1981; 195 (1): 83–92. doi: https://doi.org/10.1042/bj1950083
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