Anti-nuclear FMR1 interacting protein 1 antibodies are used for the immunodetection of the protein encoded by the NUFIP1 gene. In humans, the canonical protein has a reported length of 495 amino acid residues and a mass of 56.3 kDa. Its subcellular localization is in the nucleus. It is reported to be expressed in spleen, thymus, prostate, testis, ovary, small intestine, colon, peripheral blood leukocyte, heart, brain, placenta, lung, liver, skeletal muscle, kidney, and pancreas. It is known to bind RNA. Other names for this target antigen include Rsa1, bA540M5.1, FMR1-interacting protein NUFIP1, NUFIP1, FMR1 interacting protein 1, nuclear FMRP-interacting protein 1, and NUFIP. Gene orthologs have been identified in the mouse, rat, bovine, frog, zebrafish, chimpanzee and chicken species.