Given the variety of studies and data that have suggested the existence of heterogeneous populations or subpopulations of stem cells, this detailed volume examines different aspects of stem cell heterogeneity. This goes against the long-held tenet that stem cells, defined by their capacity for self-renewal and lineage development, comprised a homogenous population, thus providing the reader with a new avenue of exploration into the complex world of stem cell study. Written for the highly successful Methods in Molecular Biology series, chapters include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step, readily reproducible laboratory protocols, and tips on troubleshooting and avoiding known pitfalls. Authoritative and practical, Stem Cell Heterogeneity: Methods and Protocols serves as an ideal guide for investigators exploring this important area of research.