Anti-Kop antibodies enable researchers to detect and measure the Kop antigen in biological samples. This target is a reported synonym of the OPRK1 gene, which encodes opioid receptor kappa 1. This protein is known to function in carbohydrate metabolism and homeostasis and the cellular response to lipopolysaccharides, among other biological roles. The human version of Kop has a canonical amino acid length of 380 residues and a protein mass of 42.6 kilodaltons, although 2 isoforms have been identified. It is reported to be localized in the cell membrane of cells and notably expressed in the cerebral cortex. Other names for this target antigen include K-OR-1 and KOR. Indicated applications for Kop antibodies listed below include ELISA, Western Blot, Immunofluorescence, and Immunohistochemistry.