Anti-SPDYA antibodies are used in the immunodetection of the protein speedy/RINGO cell cycle regulator family member A. In humans, the canonical protein has a reported length of 313 amino acid residues and a mass of 36.5 kDa. Its subcellular localization is in the nucleus. Up to 2 different isoforms have been reported for this protein. It is reported to be highly expressed in the testis. A member of the Speedy/Ringo protein family, SPDYA is reported to regulate the G1/S phase transition of the cell cycle by binding and activating CDK1 and CDK2. Synonyms for this target antigen include RINGO A, epididymis secretory sperm binding protein, hSpy/Ringo A, rapid inducer of G2/M progression in oocytes A, speedy homolog A, and speedy protein A. SPDYA gene orthologs have been reported in the mouse, rat, bovine, frog, zebrafish, chimpanzee and chicken species. A number of SPDYA antibodies have been mentioned in research publications and have associated citations. Western Blot is a widely used application for these antibodies. Immunofluorescence and Immunohistochemistry are also common applications.