Localization of carbonic anhydrase in the cyanobacterium Chlorogloeopsis fritschii

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Abstract
90% of the carbonic anhydrase (CA) activity recovered from Chlorogloeopsis fritschii cells, when broken under conditions which favour the isolation of carboxysomes, is particulate. Subsequent sucrose density gradient centrifugation of the carboxysome-containing pellet produced a sharp band of CA, well separated from the carboxysomes and thylakoids. The implications of these findings for the possible functions of carboxysomes and location of CA are discussed

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