Anti-ESO3 antibodies enable researchers to detect and measure the ESO3 antigen in biological samples. This target is a reported synonym of the LAGE3 gene, which encodes L antigen family member 3. This protein is known to function in metabolic processes, among other biological roles. The human version of ESO3 has a canonical amino acid length of 143 residues and a protein mass of 14.8 kilodaltons. It is reported to be localized in the nucleus and cytoplasm of cells and widely expressed in many tissue types. ESO3 is a member of the CTAG/PCC1 protein family.