The K19 ELISA kits listed below utilize specific antibodies for the plate-based assay of K19 in various samples. K19 is another term for the KRT19 gene, which encodes the protein, keratin 19 in humans. It has been reported that K19 plays a role in epithelial cell differentiation and the Notch signaling pathway, among other functions. Structurally, the KRT19 protein is described to be 400 amino acid residues in length and 44.1 kilodaltons in mass. In terms of tissue specificity, it is reported to be expressed in a defined zone of basal keratinocytes in the deep outer root sheath of hair follicles. Other names for this target antigen include CK19 and K1CS. Click on the following ELISA kits for more detailed information, including target reactivity and assay sensitivity.