Calcium-binding protein. May play a role in cellular signaling events (Potential). Monomer. Does not form oligomers in the presence of calcium (By similarity). Abundant in the olfactory epithelium and the olfactory bulb. Low levels are seen in nasal respiratory epithelium, lung, kidney, cerebrum, cerebellum, brain stem, thyroid gland, heart and stomach. Phosphorylated in vitro by CaM-kinase II and CAPK.