Fig. (2) Immunohistochemical analysis of IP₃R and RyR distribution in adult mouse lacrimal gland. Representative images of (A) IP₃R1, IP₃R2, IP₃R3 and (B) RyR1, RyR2 and RyR3 immunoreactivity. (C) Negative control was performed by omission of the primary antibody. Scale bar in C for A-C, 25 µm. Red (Alexa Fluor® 594 labeled immunoreactivity) shows receptor signals and the nuclear counterstain (DAPI) is displayed in blue.