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Phenotypic characteristics of oval cells derived from porcine liver. (a) Replacement of primary antibodies with PE‐labelled IgG served as negative control. (b–d) Freshly isolated cells from porcine liver after incubation with primary antibodies including albumin (b), CK19 (c), OV6 (d) and AFP (e), followed by PE‐labelled IgG as secondary antibody. More than 92% of fresh oval cells expressed albumin and CK19.
