TNFα, IL-1α, and IL-1β protein are detected in injury domains but not slow-WD domains of Wld mice 3 d after injury. The PNS segment, which is situated distal to the injury site, was removed 3 d after injury, and cryostat sections were taken from the injury domain and its mate slow-WD domain. These were then processed simultaneously side by side for the detection of TNFα, IL-1α, and IL-1β protein by immunofluorescence microscopy. Magnification: 250×.