Figure 3. Immunohistochemical localization of adrenomedullin in a human minor salivary gland. Note ductal epithelial cell staining (lower panel). Similar findings were observed in the parotid and submandibular salivary glands (not illustrated). Upper panel, negative staining control involving the primary rabbit adrenomedullin antibody absorbed with adrenomedullin antigen before application to the specimen. Scale bar = 50 µm. This image was chosen on the basis that the histology is clearly identifiable and the localization of adrenomedullin can be seen clearly.