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Measurement of the Cyanophycin Granule Polypeptide Contained in the Blue-Green Alga Anabaena cylindrica

¹ MSU/AEC Plant Research Laboratory, Michigan State University, East Lansing, Michigan 48823 and Department of Biology, University of Rochester, Rochester, New York 14627

ABSTRACT

An assay was developed to determine the amount of cyanophycin granules in blue-green algae. The amount of this polypeptide in cells of Anabaena cylindrica was measured as a function of culture age and was compared with changes in other proteinaceous cellular components. The data presented support the notion that the cyanophycin granule is a cellular nitrogen reserve.

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