Description: This LP5K monoclonal antibody reacts with human cytokeratin 7 (K7), a 54-kDa type II (or basic) keratin expressed either alone or paired with cytokeratin 19 in simple epithelia, mesothelium, urothelium, and pseudostratified epithelium. Expression of cytokeratin 7 in the gastric foveolar, intestinal, and stratified squamous epithelia is extremely low or undetectable. Cytokeratins form the intracellular cytoskeletal network that maintains the integrity and stability of cells and tissues. In addition, most carcinomas express cytokeratin 7. The coordinated expression of this keratin with cytokeratin 20 is commonly used as a diagnostic marker for a variety of carcinomas.