2:30 PM. 176. Suspension-based Cardiac Differentiation of HiPSCs Using Scaffold-Free Aggregates and Poly(Ethylene Glycol) Fibrinogen Microspheres Impacts Cell Populations, Cardiomyocyte Yield and Tissue Function.B Justin Harvell1, Shireen Singh1, Carissa A Lee2, Nikolas D Ferreira2, Francisco X Galdos2, Mohammadjafar Hashemi1, Sidra Y Xu2, Shenbageshwaran Rajendiran1, Selen Cremaschi, PhD1, Sean M Wu, MD, PhD2, Elizabeth Lipke, PhD1 1Auburn University, 2Stanford University