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Cephalochordate amphioxus contain two Brachyury genes (AmphiBra1 and AmphiBra2). Using probes from the highly conserved coding regions, a summation of their expression profiles in amphioxus embryos have been investigated by several previous studies. However, their respective expression patterns have not been determined up to date. We here address this issue using both qRT-PCR and in situ hybridization methods (with probes from the divergent untranslated regions). qRT-PCR detected a very low maternal expression for AmphiBra2, but not