Anti-P/OKcl.13 antibodies enable researchers to detect and measure the P/OKcl.13 antigen in biological samples. This target is a reported synonym of the WNK2 gene, which encodes WNK lysine deficient protein kinase 2. This protein is known to function in intracellular signal transduction and the regulation of cell proliferation, among other biological roles. The human version of P/OKcl.13 has a canonical amino acid length of 2297 residues and a protein mass of 242.7 kilodaltons, although 4 isoforms have been identified. It is reported to be localized in the cell membrane and cytoplasm of cells and widely expressed in many tissue types. P/OKcl.13 is a member of the Ser/Thr protein kinase protein family.