Timed mutation and cell-fate mapping reveal reiterated roles of Tbx1 during embryogenesis, and a crucial function during segmentation of the pharyngeal system via regulation of endoderm expansion

The definition of time-specific requirements for a developmental gene can pinpoint the processes within which the gene is involved and can reveal potential late functions in structures and organs that fail to develop in germline mutants. Here, we show the first systematic time-course deletion, in pa...

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