Mishra et al have demonstrated that progenitor cells isolated from the atria of patients with congenital heart disease showed the highest expression of the stem cell markers c-kit and Nkx2.5 in the neonatal age group (compared to infants and older children), and that this cell content directly correlated to their regenerative potential in mouse infarct models [5]. The gene discussed is KIT; the disease is congenital heart disease.