Anti-FAM90A19 antibodies are used in the immunodetection of the protein family with sequence similarity 90 member A19. 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 A19, pseudogene, putative protein FAM90A18/FAM90A19, putative protein FAM90A18P/FAM90A19P, and protein FAM90A19.