Figures 5–7.

Figure 5. PGP9.5 immunostaining of the pancreas of an affected pig. Positive reaction against PGP9.5 antigen in epithelial duct–like cells (arrows) and islet cells (arrowheads) in pig 4. No positive reaction was detected in acinar cells. Bar = 25 μm. Figure 6. Insulin immunostaining of the pancreas of an affected pig. Positive reaction against insulin antigen in islet cells both within and outside the islet (arrows) in pig 4. Almost all islet cells were positive for insulin antigen. Bar = 50 μm. Figure 7. IHC for insulin in the pancreas of a control 200-d-old pig. Positive reaction was detected only in islet cells. Bar = 25 μm.