Keratin, type I cytoskeletal 19 also known as cytokeratin-19 (CK-19) or keratin-19 (K19) is a 40 kDa protein that in humans is encoded by the KRT19 gene.

The antibody is stable for at least 1 year from the date of receipt when stored at -20^°C to -70^°C. The reconstituted antibody can be aliquotted and stored at 4^°C for 1 month or at -20^°C to -70^°C for many months without detectable loss of activity. Please avoid multiple freeze-thaw cycles.