Anti-TBC1D21 antibodies are used in the immunodetection of the protein TBC1 domain family member 21. In humans, the canonical protein has a reported length of 336 amino acid residues and a mass of 39.2 kDa. Its subcellular localization is in the cytoplasmic vesicles and cytoplasm. Up to 2 different isoforms have been reported for this protein. It is reported to be expressed in round and elongated spermatids. TBC1D21 is known to act as a GTPase-activating protein for Rab family protein(s). Synonyms for this target antigen include male germ cell-specific expressed, containing a RabGAP domain, and male germ cell Rab GTPase-activating protein. TBC1D21 gene orthologs have been reported in the mouse, rat, bovine and chimpanzee species. Western Blot is a widely used application for the TBC1D21 antibodies listed below. In addition, Immunohistochemistry is also a common application.