Fig. 12.

Expression of P2X1 receptors, SOM, glucagon, and insulin in human pancreatic islets. a P2X1 receptor-ir. b SOM-ir in the same region of a. c The merged image of a and b. Note that all the SOM-ir cells were labeled with P2X1 receptor-ir. A yellow arrow indicates a typical double-labeled cell. d P2X1 receptor-ir. e Glucagon-ir in the same region of d. f The merged image of d and e and further immunostained with an antibody to insulin (blue color) in the same region of d and e. Note that no double or triple labeling in cells was detected. All the scale bars = 60 μm