To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie 4 Mfn2 is required for neutrophil chemotaxis to LTB4 in zebrafish.Time-lapse images of neutrophil chemotaxis in 3 dpf embryos from the transgenic lines with neutrophil specific mfn2 knockout and the control after LTB4 treatment. Scale bar: 50 μm. J Cell Sci ; doi: 10.1242/jcs.248880 Download Original Video