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Description

Calcineurin is a serine/threonine protein phosphatase involved in the mediation of signal transduction in a wide variety of cellular responses. Calcineurin has been linked to Pmk1 MAP kinase and PI pathways, as well as to members of the small GTPase Rab/Ypt family and Type II myosin. Furthermore, calcineurin participates in the transduction of extracellular signals to the nucleus by dephosphorylation of members of the NFAT family of transcription factors. These linkages demonstrate calcineurin's multifunctional capabilities in the regulation of calcium signaling. The Aalpha form of calcineurin is a major catalytic subunit gene isoform of calcineurin in most tissues that allows differentiation of Aalpha from the Abeta and Agamma isoforms.