Anti-SPDYE16 antibodies are used in the immunodetection of the protein speedy/RINGO cell cycle regulator family member E16. In humans, the canonical protein has a reported length of 312 amino acid residues and a mass of 37.5 kDa. It is notably expressed in the testis. It is a member of the Speedy/Ringo protein family. Synonyms for this target antigen include putative speedy protein E16 and WBSCR19-like protein 5-like.