Six1a is required for the onset of fast muscle differentiation in zebrafish.

Abstract excerpt

Vertebrate skeletal muscles arise from two major types of precursor cell populations which differentiate into slow and fast fibers. Six1 homeodomain transcription factor was implicated in myogenesis in mammals, but its role in the development of different types of muscle precursors remained unclear. In zebrafish, there are two close homologs of Six1: six1a (known earlier as six1) and six1b identified in this...

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