Anti-cytoplasmic polyadenylated homeobox 1 antibodies enable researchers to detect and measure the cytoplasmic polyadenylated homeobox 1 antigen in biological samples. This target is a reported synonym of the CPHXL gene, which encodes cytoplasmic polyadenylated homeobox like. This protein is known to function in the regulation of transcription, among other biological roles. The human version of cytoplasmic polyadenylated homeobox 1 has a canonical amino acid length of 405 residues and a protein mass of 45.7 kilodaltons. It is reported to be localized in the nucleus of cells.