Anti-KRR1 small subunit processome component homolog antibodies are used for the immunodetection of the protein encoded by the KRR1 gene. In humans, the canonical protein has a reported length of 381 amino acid residues and a mass of 43.7 kDa. Its subcellular localization is in the nucleus and cytoplasm. Alternative splicing is reported to yield 2 different isoforms for this protein. A member of the KRR1 protein family, it is known to be a part of the small subunit (SSU) processome, first precursor of the small eukaryotic ribosomal subunit. Other names for this target antigen include RIP-1, HIV-1 Rev-binding protein 2, HIV-1 rev binding protein 2, KRR-R motif-containing protein 1, KRR1, small subunit (SSU) processome component, homolog, and HRB2. Gene orthologs have been identified in the mouse, rat, bovine, frog, zebrafish, chimpanzee and chicken species.