Fig5A. Copyright: Reprinted with permission from Elsevier from [doi:10.1006/dbio.2000.0133] Dev Biol 231: 252-64, Campione M; Ros MA; Icardo JM; Piedra E; Christoffels VM; Schweickert A; Blum M; Franco D; Moorman AF, Pitx2 expression defines a left cardiac lineage of cells: evidence for atrial and ventricular molecular isomerism in the iv/iv mice. Copyright 2001