s after transfection. By the end of the experiments, i.e. after 00 weeks, 00--00% of all animals showed abnormal phenotypes (*Cnox*-0: 00,0%; *Cnox*-0: 00,0%; *Cnox*-0: 00,0%; *Cnox*-0: 00,0%; N = 00--000 medusae per experiment). In all control populations, the percentage of PAMs was fewer than 0%.  