MZudu mutant gastrulae exhibit irregular notochord boundaries. a–b Still images from live Nomarski time-lapse series of the dorsal mesoderm in WT (a) and MZudu−/− embryos (b) at the time points indicated. Images are representative of over 40 MZudu−/− gastrulae. Arrowheads indicate notochord boundaries. c–d Live confocal microscope images of representative WT (c, N = 23) and MZudu−/− (d, N = 43) embryos expressing membrane Cherry. Yellow lines mark notochord boundaries. e Quantification of notochord boundary straightness in live WT and MZudu−/− gastrulae throughout gastrulation. Symbols are means with SEM (two-way ANOVA, ****p < 0.0001). f–g Confocal microscope images of immunofluorescent staining for pan-Laminin in WT (f) and MZudu−/− (g) embryos at two-somite stage. N indicates the number of embryos analyzed. Scale bars are 50 μm. Anterior is up in all images
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