Anti-Ctb9 antibodies enable researchers to detect and measure the Ctb9 antigen in biological samples. This target is a reported synonym of the KLHL42 gene, which encodes kelch like family member 42. This protein is known to function in the cell cycle, among other biological roles. The human version of Ctb9 has a canonical amino acid length of 505 residues and a protein mass of 56.9 kilodaltons. It is reported to be localized in the cytoplasm of cells.