The K1 ELISA kits listed below are analytical tools for measuring concentrations of K1 in various samples. K1 is an alternative name for the human KRT1 gene, which encodes the protein, keratin 1. It has been mentioned that K1 plays a role in the response to oxidative stress, among other functions. Structurally, the KRT1 protein is described to be 644 amino acid residues in length and 66 kilodaltons in mass. It is localized to the cell membrane and cytoplasm of the cell. Other names for this target antigen include AEI2, CK1, and EHK.