Fig. 8

a A schematic of transverse views of a zebrafish head indicating phenotypes regulated by Wnt signaling. White arrows indicate eyes and the balbis indicates the distance between eyes. b The transverse views of a (i) WT zebrafish head, a WT zebrafish head injected with (ii) crbn mRNA, or (iii–v) one of three distinct crbn guide RNAs (sgRNA) along with dCas9 mRNA, in the absence or presence of (iv) crbn mRNA or (v) β-catenin (ctnnb1) mRNA. White arrows indicate eyes, the gray arrow indicates merged eyes, and the balbis indicates the distance between eyes. Scale bar = 200 μm. c, e and g Quantifications of the indicated eye phenotypes are shown. Asterisks indicate statistical significance (Fisher’s exact test, *p value < 0.05, ****p value < 0.0001). d and f RNA extracts from the indicated zebrafish (20 hpf) were used to determine the expression of three Wnt target genes using quantitative RT-PCR. Quantification of gene expression in indicated zebrafish embryos (mean ± SEM, n = 3 independent pools of zebrafish embryo) is shown. Asterisks indicate statistical significance (two-tailed Student’s t-test, *p value < 0.05, ***p value < 0.001, ****p value < 0.0001). lef1 lymphoid enhancer-binding factor 1.