G. Polarisation Index (PI) of rab13 and kdr detected by smFISH in individual zebrafish cells (n≥8 cells; **P<0.01, ns: not significant; one-way ANOVA with Bonferroni's correction). : +/+, +/∆ and ∆/∆ represent Tg(kdrl:EGFP) rab13+/+, rab13+/∆3'UTR and rab13∆3'UTR /∆3'UTR embryos, respectively 