GATA4 expression peaked on day 11 (15.00 ± 13.24 on day 11 vs 1.00 ± 0.35 pre MI; p = 0.029), and Nkx2.5 expression peaked on day 21 after MI (9.74 ± 4.73 on day 21 vs 1.00 ± 0.91 pre MI; p = 0.002) (Figure 1B). The gene discussed is NKX2-5; the disease is myocardial infarction.