A few late erythroid cells, but not hepatocytes, in the fetal liver of jmj^trap/trap embryos at 12.5 dpc. Representative photographs of transverse sections from the fetal liver of 12.5 dpc jmj^+/+ embryos (A and C) andjmj^trap/trap embryos (B and D) are shown. The sections were stained with TER-119 antibody (A and B), or albumin antibody (C and D). The positive cells stain brown. Scale bar, 50 μm.