Anti-FAM90A9 antibodies are used in the immunodetection of the protein family with sequence similarity 90 member A9. In humans, the canonical protein has a reported length of 464 amino acid residues and a mass of 49.7 kDa. It is a member of the FAM90 protein family. Synonyms for this target antigen include family with sequence similarity 90 member A9, pseudogene, putative protein FAM90A9P, and putative protein FAM90A9.