fig2

Figure 2. Liver from a mouse fed diethyl 1, 4-dihydro, 1, 4, 6-trimethyl 3, 5-pyridine decarboxylate (DDC) for 5 months, then withdrawn from DDC for 1 month, then refed DDC for 3 days (×567). Note that the hyperplastic nodule stained red for gamma-glutamyl transferase is devoid of protoporphyrin pigment whereas the normal liver parenchyma has numerous protoporphyrin deposits as shown