Transgenic zebrafish strains used in this study were Tg(fli1a:EGFP)y1 [28 (link)], Tg(fli1a:H2B-mCherry)uq37bh [43 (link)], and Tg(fli1aep:ERK-KTR-Clover)uq39bh [32 (link)]. Larvae/embryos were anaesthetised in 0.08 mg/mL tricaine and mounted as previously described [44 (link)]. Zebrafish live-imaging was conducted using either an Olympus MVX fluorescent microscope, Zeiss LSM 710 FCS confocal microscope, Zeiss Elyra 780 confocal microscope, Nikon Yokogawa CSU-W1 spinning disc confocal microscope, or the Zeiss Z. 1 lightsheet fluorescent microscope.
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