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Characterization of the PFL stem cell. IPFLS express ALB, AFP, CK8/18, CK7, and CK19 (A–E, respectively). (F–H) Bipotent nature of IPFLS cells. After 7 days of culture, each single IPFLS cell proliferated to reach a cluster that express both ALB (G) and CK19 (H). Magnification, ×400.
