Fig 1
A) Schematic of the lyz:MPO-mEmerald cmlc2:EGFP construct, which includes the neutrophil-specific promoter (lyz), the MPO gene with a C-terminal fluorescent tag (MPO-mEmerald) and a green heart marker to aid optimisation of transgenesis (cmlc2:EGFP). B) A zebrafish larva at 3 days post fertilisation (dpf), with the caudal haematopoietic tissue (CHT) indicated by the red box. C) The CHT of a double-transgenic Transient lyz:MPO-mEmerald,cmlc2:EGFP; Tg(lyz:nfsB-mCherry)sh260 larva with a population of neutrophils expressing both mEmerald and mCherry. The white arrowhead indicates the neutrophil enlarged below. D) Enlarged view of a neutrophil expressing mEmerald and mCherry.