Fig. (4) Immunolabeling for virus in human primary pancreatic cell clusters on day four post virus inoculation. Sections of the human endocrine fraction inoculated with V89-4557 and Adr respectively and immunolabeled for (A) chromogranin A (V89-4557+) and (B) HEVP1 (left V89-4557+, right Adr+). Serial sections of the human pancreatic exocrine fraction from the same donor inoculated with V89- 4557 and Adr respectively and immunolabeled for (C, E) chromogranin A and (D, F) HEVP1. Scale-bars correspond to 200 µm.