<p>(A) Whole mount in situ hybridization of wild type and DL1ICD-expressing embryos showing normal Hey1 expression. (B) qRT-PCR analysis of Hes5 and Hey2 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