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Chloroplast Alkaline Fructose 1,6-Bisphosphatase Exists in a Membrane-Bound Form

Ruth Alscher-Herman
Plant Physiology
Vol. 70, No. 3 (Sep., 1982), pp. 728-734
Stable URL: http://www.jstor.org/stable/4267576
Page Count: 7
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Chloroplast Alkaline Fructose 1,6-Bisphosphatase Exists in a Membrane-Bound Form
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Abstract

An alkaline fructose 1,6-bisphosphatase activity associated with soybean (Glycine max cv Beeson) chloroplasts appears to be membrane-bound. The pH optimum of the membrane-associated activity corresponds to that found for activity associated with the stroma. Illumination of washed thylakoids results in an increase in alkaline fructose 1,6-bisphosphatase activity in the absence of any added stromal factors. Exposure to pH 8.0 results in a partial release of enzyme activity from the membrane. The activation status of the enzyme does not appear to alter its association with the membrane.

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