Fig. 4
EWS-FLI1 induces developmental defects in zebrafish embryos. (A) Non-transgenic (GFP?) embryos are wild type. (B) Transgenic embryos (GFP+) carrying a heat-shock-inducible EWS-FLI1 transgene exhibit pericardial edema (arrow) and reduced head and eye size. (C) A morpholino against the transgene decreases the penetrance of the pericardial edema phenotype. (D) Percentage of transgenic embryos exhibiting pericardial edema is decreased using a morpholino targeting the EWS-FLI1 transgene. (E) RT-PCR for EWS-FLI1 shows low level of expression without heat shock (?HS) and increased expression following heat shock (+HS). no RT, no RT negative control.