<p>(A) GFP expression in male, and hetero-and homozygous female transgenic embryos indicating Cre-mediated activation of transgene expression. (B) Western blot analysis of cell lysates from wild type and DL1ICD-expressing embryos. (C) Whole mount in situ hybridization of wild type (a, h) and DL1ICD-expressing (b-g, and i-n) embryos showing normal anterior-posterior somite patterning (a-g) and muscle differentiation (h-n). (D) Whole mount in situ hybridization of wild type (a) and DL1ICD-expressing (b-g) embryos showing normal neuronal differentiation. (E) qRT-PCR analysis of Nfem and Isl1 expression in wild type and DL1ICD-expressing embryos. Indicated are means and SEM of expression levels determined in individual wild type and transgenic embryos. ns: not significant (p>0.05).</p