Description: This antibody is specific to human cytokeratin 18 of 45 kDa which belongs to a family of acidic type A and exists along with cytokeratin 8 in most simple ductal and glandular epithelia. This antibody does not react with squamous epithelium. It reacts with benign and malignant epithelial lesions, the majority of adenocarcinomas, and basal cell carcinomas.