This pathway has been largely adapted from an article by Deepak Srivastava, Cell. 2006 Sep 22;126(6):1037-48. In this pathway are known transcription factors, miRNAs and regulatory proteins that impact the regional specificity of the human heart. Activating signals are indicated by arrows while inhibitory signals are indicated by T-bars. Special thanks to Kim Cordes for her assistance in revising this pathway, based on recent heart development research.