Junctional and medial myosin dynamics in crb-RNAi NBs versus NICs. (A and B) Junctional (A) and medial (B) myosin ratios between ingressing NBs and their surrounding NICs (schematics), plotted against ingression speed (apical area loss in μm²/min). Dots are the medians of myosin ratios NB/NIC_A–F, determined while the NB apical surface decreased from 20 to 2.5 μm². Bars are IQRs. N = 19 control NBs, three embryos; N = 25 crb-RNAi NBs, five embryos. R² is the correlation coefficient of a linear fit, with its corresponding P value.