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Growth factors species selection

The neurotrophins interact with two distinct cell surface receptor species [5,6,9] (Fig. 27-2). The neurotrophins bind to the Trk family of receptors, which serve as the principal signal transducer for this class of growth factors. The Trk receptors comprise a small, highly related family of molecules that possess an extracellular ligand binding domain that selectively interacts with the individual neurotrophin species. Trk A specifically binds NGF, TrkB interacts with BDNF and NT4/5, and TrkC preferentially binds NT3. Importantly, the Trk receptors have an intracellular tyrosine kinase domain that is activated upon neurotrophin binding. The kinase domains of the Trk family members are highly conserved and the Trks differ mainly in the structure of their extracellular domains. Trk receptor expression is limited to neurons and the... [Pg.474]


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See also in sourсe #XX -- [ Pg.22 , Pg.23 ]




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