Figure 2B. [doi:10.1074/jbc.M607446200] Xu L; Renaud L; Muller JG; Baicu CF; Bonnema DD; Zhou H; Kappler CS; Kubalak SW; Zile MR; Conway SJ; Menick DR, "Regulation of Ncx1 expression. Identification of regulatory elements mediating cardiac-specific expression and up-regulation." J Biol Chem 2006 Nov 10;281(45):34430-40. [PMID:16966329]