Fig. 5.
In vivo validation of genes repressed in RA-treated NMPs. Shown are whole-mount in situ hybridization results to detect mRNA in E8.0-E8.5 wild-type (WT) and Raldh2−/− (−/−) RA-deficient mouse embryos. Analyzed here are two genes that were found by RNA-seq to be repressed by treatment of NMPs with 25 nM RA: (A,B) Id1, (C) Fst; n=3 embryos examined for each gene. Arrows indicate the location of transverse sections through the posterior neural tube; arrowheads indicate the location of transverse sections through the caudal epiblast; numbered panels to right refer to corresponding sections. CLE, caudal lateral epiblast; LPM, lateral plate mesoderm; NT, neural tube; PS, primitive streak; PSM, presomitic mesoderm; S, somite.