Anti-FAM199X antibodies are used in the immunodetection of the protein family with sequence similarity 199, X-linked. In humans, the canonical protein has a reported length of 388 amino acid residues and a mass of 42.8 kDa. Up to 2 different isoforms have been reported for this protein. It is notably expressed in the endometrium, colon, cerebral cortex, bronchus, and appendix. It is a member of the FAM199 protein family. Synonyms for this target antigen include protein FAM199X. FAM199X gene orthologs have been reported in the mouse, rat, bovine, frog, zebrafish, chimpanzee and chicken species. Immunocytochemistry is the most common application for the FAM199X antibodies listed below. Western Blot, Immunofluorescence, and Immunohistochemistry are also common applications.