PU.1/Spi-1 Antibody [Alexa Fluor® 405]

• Reactivity: Hu
• Applications: WB, CyTOF-ready, Flow, ICC/IF
• Clonality: Polyclonal
• Host: Sheep
• Conjugate: Alexa Fluor 405

PU.1/Spi-1 Antibody [Alexa Fluor® 405] Summary

• Immunogen: E. coli-derived recombinant human PU.1
  Met1-Lys169
  Accession # NP_001074016
• Specificity: Detects human PU.1 in direct ELISAs and Western blots. In direct ELISAs, approximately 5% cross-reactivity with recombinant human SPI-B is observed.
• Isotype: IgG
• Clonality: Polyclonal
• Host: Sheep
• Purity Statement: Antigen Affinity-purified

Applications/Dilutions

• Dilutions:
  • CyTOF-ready
  • Immunocytochemistry
  • Intracellular Staining by Flow Cytometry
  • Western Blot

Packaging, Storage & Formulations

• Storage: Protect from light. Do not freeze. 12 months from date of receipt, 2 to 8 °C as supplied
• Buffer: Supplied 0.2mg/ml in 1X PBS with RDF1 and 0.09% Sodium Azide

Notes

This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.

Alternate Names for PU.1/Spi-1 Antibody [Alexa Fluor® 405]

• hematopoietic transcription factor PU.1
• OF
• PU.1
• SFPI1
• SFPI131 kDa transforming protein
• SPI-1 proto-oncogene
• SPI1
• Spi-1
• SPI-A
• spleen focus forming virus (SFFV) proviral integration oncogene spi1,31 kDa-transforming protein
• transcription factor PU.1

Background

PU.1 (Purine-rich nucleic acid binding protein 1; also 31 kDa transforming protein and SPI-1) is a member of the PU subfamily, ETS family of transcription factors. Although its predicted MW is 31 kDa, it appears to run anomalously high in SDS-PAGE at 40‑45 kDa. PU.1 is a monomeric hematopoietic protein that regulates the differentiation of early myeloid and lymphoid progenitors. High PU.1 levels favor granulocyte and macrophage production, while low levels generate magakaryocytes, erythrocytes, T and B cells. Human PU.1 is 270 amino acids (aa) in length. It contains an N-terminal acidic/polyGln transactivation region (aa 34‑99), a non‑destabilizing PEST sequence (aa 117‑165) and a C-terminal Ets DNA-binding domain (aa 170‑253). PU.1 is phosphorylated on Ser146, allowing it to bind to Pip. Over aa 1‑169, human PU.1 shares 88% aa identity with mouse PU.1.

Limitations

This product is for research use only and is not approved for use in humans or in clinical diagnosis. Primary Antibodies are guaranteed for 1 year from date of receipt.