mouse monoclonal IgG1; SAF-B Antibody (F-3) is an IgG1 κ mouse monoclonal SAF-B antibody (also designated SAF-B antibody) that detects the SAF-B protein of mouse, rat and human origin by WB, IP, IF and ELISA. SAF-B Antibody (F-3) is available as both the non-conjugated anti-SAF-B antibody form, as well as multiple conjugated forms of anti-SAF-B antibody, including agarose, HRP, PE, FITC and multiple Alexa Fluor® conjugates. Heterogeneous nuclear ribonucleoproteins (hnRNPs) constitute a set of polypeptides that contribute to pre-mRNA processing and transport. hnRNPs also bind heterogeneous nuclear RNA (hnRNA), the transcripts produced by RNA polymerase II. SAF-B (scaffold attachment factor B) is a nuclear matrix-associated protein that binds to matrix- or scaffold-associating regions (MARs or SARs) on DNA and interacts with RNA polymerase II and serine-/arginine-rich RNA processing factors (SR proteins). SAF-B, also designated HAP (hnRNP A1 associated protein) and HET (HSP 27-ERE-TATA-binding protein) is a proven hnRNP protein that has a speckled distribution in the nucleus and, in response to stress agents such as heat shock, is recruited to a few, large nuclear granules, called perichromatin granules. SAF-B also binds to the estrogen receptor (ER) and is expressed in several breast cancer cell lines at varying levels. Subsequently, SAF-B may play a role in breast cancer by mediating cellular proliferation and division.