Figure 1 Identification of β2‐microgroglubilin (β₂m) negative cells in liver sections 72 hours after intraportal infusion of bone marrow derived cells (BMDCs). Liver sections from a control animal without ischaemia/reperfusion (I/R) injury (group A). (A) Typical appearance at confocal microscopy of a fluorescence labelled cell in non‐injured liver parenchyma. (B) At immunohistochemistry for β₂m a small cell with ovoid nucleus, condensed chromatin, and a small rim of β₂m negative cytoplasm is visible inside a liver sinusoid (arrow). Liver sections from animals with I/R injury (group B). (C) Typical appearance at confocal microscopy of a fluorescence labelled cell in injured liver parenchyma. (D) (E) (F) At immunohistochemistry, β₂m negative cells with smaller nuclei than the surrounding hepatocytes are integrated within liver parenchyma; nuclear chromatin looks less condensed than in group A (arrowheads) and the cells acquire a polygonal shape with a large cytoplasm. (Original magnification: (A), (B) ×100; (C), (D), (E), (F) ×40.)