Fig2K. Copyright: Reprinted with permission from Elsevier from [doi:10.1006/dbio.1996.0326] Dev Biol 180: 534-42, Chapman DL; Agulnik I; Hancock S; Silver LM; Papaioannou VE, Tbx6, a mouse T-Box gene implicated in paraxial mesoderm formation at gastrulation. Copyright 1996