fig2
![Preneoplastic foci in mice fed diethyl 1, 4-dihydro, 1, 4, 6-trimethyl 3, 5-pyridine decarboxylate are resistant to protoporphyrin accumulation](https://image.oaes.cc/0296a05a-9877-4bce-b03f-58362499d09f/1151.fig.2.png)
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 Liver from a mouse fed diethyl 1, 4-dihydro, 1, 4, 6-trimethyl 3, 5-pyridine decarboxylate (DDC) for 5 months, then withdrawn from DDC for 1 month, then refed DDC for 3 days (×567).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