Cholera toxin and its B subunit do not change cytosolic free calcium concentration.


Using the fluorescent Ca2+ probe Quin-2 it has been reported that cholera toxin (CT) and its B subunit (B-CT) increase cytosolic free Ca2+ concentration ([Ca2+]i) in entherocytes, thymocytes and fibroblasts. In this work we show, however, that the fluorescence increases of Quin-2-loaded cells (rat thymocytes, mouse splenocytes, P-388 macrophages and 3T3… (More)


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