Fig. 5From: Analysis of epithelial-mesenchymal transition markers in the histogenesis of hepatic progenitor cell in HBV-related liver diseasesEM examination was performed to find ultrastructural evidence for the transition. a Three HPCs identified by EM. An IHLC with more cytoplasm and mitochondria than HPCs was in close association with HPCs. b There were intercellular junctions among HPCs, cholangiocytes, and intermediate hepatocyte (arrow). Tonofilament bundles in cytoplasm of HPCs indicated the reacquisition of epithelial characteristic (arrowhead)Back to article page