TRPA1 is expressed on sensory neurons innervating various organs including respiratory tract, heart, gastrointestinal tract, urinary bladder etc. Non-neuronal cells of many organs like enterochromaffin cells of intestine, keratinocytes. Melanocytes, pancreatic islets, gall bladder etc. also express TRPA1 on cell membrane. Representative figure showing major organs expressing TRPA1 (different colored stars have been used for the neuronal and non-neuronal expression in respective organs)