Fig. 1. The normal expression patterns of eFGF and XmyoD showing co-expression in the early mesoderm. Whole-mount in situ hybridisation showing expression of (A) eFGF at stage 10 and (B) Xmyod at stage 10 and (C) Xmyod at stage 10 (+). Expression of XmyoD across the dorsal midline is rapidly excluded as Spemann’s organiser signalling is established.