Images and probe sequence provided by Claire Anderson. The probe was supplied by T Jaffredo. Related paper: Anderson C, Hill B, Lu HC, Moverley A, Yang Y, Oliveira NMM, Baldock RA, Stern CD. A 3D molecular atlas of the chick embryonic heart. Dev Biol. 2019 Dec 1;456(1):40-46. doi: 10.1016/j.ydbio.2019.07.003. Epub 2019 Jul 5.