Figure 1. Epifluorescence microscopic image of salivary glands by immunohistochemical assay against Exendin-4, in AAV-5 Exendin-4 treated (Fig. A) and control High Fat-Diet mice (Fig. B); barr  = 20 µm.

The immunoreaction products are observed under a Zeiss Axioskop microscope at x40 magnification.