Discovery
TBR1 was identified in 1995 by the Nina Ireland Laboratory of Developmental Neurobiology Center at the University of California, San Francisco. The gene, initially named TES-56, was found to be largely expressed in the telencephalic vesicles of the developing forebrain of mice. The protein product of TES-56 was discovered to be homologous to the Brachyury protein, a T-box transcription factor, which plays a role in establishing symmetry during embryonic development. Thus, due to its relation to T-box genes (such as Tbx-1, Tbx-2, Tbx-3), TES-56 was renamed TBR1.
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