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Also known as: MTC; TRK; TRK1; TRKA; Trk-A; p140-TrkA<br />This gene encodes a member of the neurotrophic tyrosine kinase receptor (NTKR) family. This kinase is a membrane-bound receptor that, upon binding of neurotrophins, phosphorylates itself and members of the MAPK pathway. The presence of this kinase leads to cell differentiation and may play a role in specifying sensory neuron subtypes. Mutations in this gene have been linked to congenital pain insensitivity, anhidrosis, self-injurious behavior, cognitive impairment and cancer. Other transcriptional splice variants of this gene have been identified, but only three have been characterized to date.