Anti-RBMY1B antibodies are used in the immunodetection of the protein RNA binding motif protein Y-linked family 1 member B. In humans, the canonical protein has a reported length of 496 amino acid residues and a mass of 55.8 kDa. Its subcellular localization is in the nucleus. It is reported to have testis-specific expression. RBMY1B is reported to be a rna-binding protein, which may be involved in spermatogenesis. Synonyms for this target antigen include RNA-binding motif protein, Y chromosome, family 1 member D, and RNA-binding motif protein, Y chromosome, family 1 member B.