Figure 2: Sections of specimen processed for demonstration of TNF-alpha mRNA via in situ hybridization. Stainings with antisense (a) and sense (b) probes. The specimen was from the 6w group, experimental side. The regions shown in (a) and (b) are from corresponding areas. There are TNF-alpha mRNA reactions in white blood cells of an inflammatory infiltrate (arrows, a). There are no reactions in the sense control section (b). Bar=25 μm.