Figure 2 Stained frozen tissue sections using mouse anti-human keratin type 19 (K-19) monoclonal antibody (x200 magnification). a: Normal skin (No K-19 positive cells. b-g: After treatment with MEBO wound ointment. b: 24 h postburn (a few K-19 positive cells appeared). c: Day 4 postburn (the number of K-19 positive cells increased). d: Day 7 postburn (the number of K-19 positive cells peaked). e: Day 14 postburn (the number of K-19 positive cells plateaued). f: Day 21 postburn (the number of K-19 positive cells decreased). g: Day 28 postburn (the number of K-19 positive cells decreased significantly). See Xu RX (2004) in Burns Regenerative Medicine & Therapy, p.117, S. Karger AG, Basel (Switzerland).