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Stroma, envelope and thylakoid membranes were prepared from chloroplasts isolated from leaves of Beta vulgaris. Out of total plastidic protochlorophyllide, envelope membranes contained 1.5%, thylakoids had the maximum 98.48% and stroma had a trace fraction of 0.02%. Distribution of the Mg-protoporphyrin IX and its monoester was 89.0% in thylakoids, 10.0% in stroma and 1.0% in envelope. A substantial...
NADPH-protochlorophyllide oxidoreductase (POR) catalyzes the photoreduction of protochlorophyllide a in the chlorophyll biosynthetic pathway. Recently, two POR genes, the expressions of which were differently regulated by light, were isolated in barley and Arabidopsis, and it is suggested that in angiosperms, the chlorophyll synthesis is controlled by the differential action of the two distinct POR...
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