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Rare case of squamous cell carcinomas of cervix displayed strong cytoplasmic staining. Few cases of urothelial and breast cancers along with few cases of pancreatic cancers showed moderate staining. Remaining cancer tissues were weakly stained or negative.
This gene encodes a member of the type I (acidic) cytokeratin family, which belongs to the superfamily of intermediate filament (IF) proteins. Keratins are heteropolymeric structural proteins which form the intermediate filament. These filaments, along with actin microfilaments and microtubules, compose the cytoskeleton of epithelial cells. Mutations in this gene are associated with epidermolytic hyperkeratosis. This gene is located within a cluster of keratin family members on chromosome 17q21. [provided by RefSeq, Jul 2008]