Specificity:Recognizes human Cytokeratin 18, most mammals incl. mouse and rabbit; in Species (tested so far); Negative with rat. Recommended for Glandular epithelium (e.g. endocervix). Specifically recognizes all simple type epithelia. Not reactive with stratified and non-stratified squamous epithelia. Polypeptide reacting: 45kD cytokeratin 18.