Images and probe sequence provided by Claire Anderson. The probe was supplied by Bernd Sokolowski and Paul Fuchs. Related paper: Anderson C, Khan MAF, Wong F, Solovieva T, Oliveira NMM, Baldock RA, Tickle C, Burt DW, Stern CD. A strategy to discover new organizers identifies a putative heart organizer. Nat Commun. 2016 7:12656. doi: 10.1038/ncomms12656.