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Biochem Biophys Res Commun. 1986 Jan 29;134(2):736-42.

p60c-src activity detected in the chromaffin granule membrane.


Using monoclonal antibodies specific for p60c-src we have detected high levels of this kinase in adrenal medullary chromaffin tissue and in highly purified chromaffin granule (secretory vesicle) membranes. An immune complex kinase assay was applied to fractions of adrenal medullary tissue resolved on sucrose density gradients. Thirty-seven per cent of the total tissue p60c-src activity was found in association with chromaffin granule or granule membrane markers. Localization of a significant fraction of total cellular p60c-src activity to this secretory vesicle membrane suggests that the kinase may function in the regulation of neurotransmitter release.

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