ITGA2B and hereditary elliptocytosis: In these cultures, most of the early emerging hematopoietic cells co-expressed CD41a (Figure S4C), suggesting that in human hematopoiesis the earliest blood cells derived from HE express CD41, similar to what was observed during the emergence of the murine hematopoietic system (Ferkowicz et al., 2003, Mikkola et al., 2003).