(b) The haematoxylin and eosin (HE) and CD45 staining of 10-month-old WT and NRBF2 KO mice livers. The NRBF2 KO liver shows mild increase of ductular reaction (yellow arrow) and isolated necrosis (red arrows). The necrotic foci were further confirmed by CD45 staining (black arrow). This is a representative image from four mice per genotype. Scale bar, 50 μm. (c) The number of necrotic foci and ductular reaction scores were recorded under bright-field microscope. At least 10 randomly selected fields (10 × ) from each mouse and four mice per genotype were analysed. (Data are shown as mean±s.e.m., P values are indicated on the figures. Ductular reaction scores, unpaired Student's t-test; necrotic foci, Mann-Whitney U-test, n=4 mice each group). BD, bile duct; CV, central vein; PV, portal vein. 