Specificity:Recognizes glandular epithelial cells from gastrointestinal tract, respiratory tract and urogenetical tract, endocrine and exocrine tissues and mesothelial cells. Unreactive with stratified squamous epithelia (esophagus, epidermis, ectocervix). In transitional epithelium of the bladder only reacts with the superficial (umbrella) cells. Species Crossreactivity: mammals, birds.