MOXD1 and neoplasm: We further investigated the impact of MOXD1 on neuroblastoma tumorigenesis using the Tg(dbh:MYCN; dbh:EGFP) zebrafish model generated by Tao et al. (42), hereafter referred to as MYCN-TT (Fig. 4), which coexpresses enhanced green fluorescent protein (eGFP) and human MYCN under the control of the zebrafish dβh promoter, and found that there was a baseline tumor penetrance of 79% (Fig. 4A).