Calcium-activated chloride channel (CaCC) which may play a role in olfactory signal transduction. Odorant molecules bind to odor-sensing receptors (OSRs), leading to an increase in calcium entry that activates CaCC current which amplifies the depolarization of the OSR cells, ANO2 seems to be the underlying chloride channel involved in this process. May mediate light perception amplification in retina. Channel activity is repressed by chloride inhibitors; strongly by niflumic acid (NFA), partially by flufenamic acid (FFA), and only slightly by meclofenamic acid (MFA), 5-Nitro-2-(3-phenylpropylamino)benzoic acid (NPPB), 4-acetamido-4'-isothiocyanato-stilben-2,2'-disulfonate (SITS), and 4,4'-diisothiocyanatostilbene-2,2'-disulfonic acid (DIDS). Component of a presynaptic protein complex recruited to specialized plasma membrane domains of photoreceptors. Interacts with DLG4 by its C-terminal region (By similarity). Retina, especially in the photoreceptor synaptic terminals. The term 'anoctamin' was coined because these channels are anion selective and have eight (OCT) transmembrane segments. There is some dissatisfaction in the field with the Ano nomenclature because it is not certain that all the members of this family are anion channels or have the 8-transmembrane topology. Splice site between exons 4 and 5 is non-canonical. Splice site between exons 4 and 5 is non-canonical. Belongs to the anoctamin family. Truncated N-terminus.