Anti-FAM124B antibodies are used in the immunodetection of the protein family with sequence similarity 124 member B. In humans, the canonical protein has a reported length of 455 amino acid residues and a mass of 51 kDa. Its subcellular localization is in the nucleus. Alternative splicing is reported to yield 2 different isoforms for this protein. The FAM124B protein is a member of the FAM124 protein family. Synonyms for this target antigen include protein FAM124B and family with sequence similarity 124B.