Cell Differentiation 1 Chemically defined medium Differentiation 1 Fibroblast Growth Factors 1 Glucose 1 Glycogen Synthase Kinase 3 1 Human pluripotent stem cells 1 Induced Pluripotent Stem Cells 1 Lactic Acid 1 Myocytes, Cardiac 1 Signaling pathway 1 Sinoatrial Node 1 Sinoatrial node-like cells 1 Small molecule 1 Wnt Signaling Pathway 1 Wnt signaling 1 cardiac muscle cell 1 cell differentiation 1 fibroblast growth factor 1 genetics 1 glucose 1 glycogen synthase kinase 3 1 induced pluripotent stem cell 1 lactic acid 1 metabolism 1 sinus node 1