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Trends Cell Biol. 1994 Jun;4(6):207-12.

JAK protein tyrosine kinases: their role in cytokine signalling.

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1
Laboratory for Clinical and Experimental Research, University of Berne, Switzerland.

Abstract

Protein tyrosine kinases (PTKs) are integral components of the cellular machinery that mediates the transduction and/or processing of many extra- and intracellular signals. Members of the JAK family of intracellular PTKs (JAK1, JAK2 and TYK2) are characterized by the possession of a PTK-related domain and five additional homology domains, in addition to a classical PTK domain. An important breakthrough in the understanding of JAK kinases function(s) has come from the recent observations that many cytokine receptors compensate for their lack of a PTK domain by utilizing members of the JAK family for signal transduction.

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