• Species Reactivity

  Human

• Specificity

  Detects human Leptin R in direct ELISAs and Western blots. In Western blots, cross reactivity with recombinant mouse Leptin R is observed.

• Source

  Monoclonal Mouse IgG    _2B Clone # 52263

• Purification

  Protein A or G purified from ascites

• Immunogen

  Mouse myeloma cell line NS0-derived recombinant human Leptin R    
  Phe22-Asp839 (predicted)    
  Accession # P48357

• Formulation

  Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied as a 0.2 µm filtered solution in PBS.

• Label

  Unconjugated

Applications

• Recommended    
  Concentration

  Sample

• Western Blot

  1 µg/mL

  Recombinant Human Leptin R Fc Chimera (Catalog # )

• 
  

• Flow Cytometry

  2.5 µg/10    ⁶ cells

  See below

• 
  

• Immunohistochemistry

  8-25 µg/mL

  Immersion fixed paraffin-embedded sections of human brain (cortex and hippocampus)

• 
  

• CyTOF-ready

  Ready to be labeled using established conjugation methods. No BSA or other carrier proteins that could interfere with conjugation.

• 
  

Please Note: Optimal dilutions should be determined by each laboratory for each application.  are available in the Technical Information section on our website.

Data Examples

Preparation and Storage

• Reconstitution

  Reconstitute at 0.5 mg/mL in sterile PBS.

• Shipping

  The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. *Small pack size (SP) is shipped with polar packs. Upon receipt, store it immediately at -20 to -70 °C

• Stability & Storage

  Use a manual defrost freezer and avoid repeated freeze-thaw cycles.    

• 12 months from date of receipt, -20 to -70 °C as supplied.

• 1 month, 2 to 8 °C under sterile conditions after reconstitution.

• 6 months, -20 to -70 °C under sterile conditions after reconstitution.

Background: Leptin R

Leptin receptor (OB-R), also named B219, is a type I cytokine receptor family protein with significant amino acid sequence identity with gp130, G-CSF receptor, and the LIF receptor. Multiple isoforms of human and mouse OB-R, including a long form (OB-R_L) with a large cytoplasmic domain capable of signal-transduction, and several receptor isoforms with short cytoplasmic domains (OB-R_s) lacking signal-transducing capabilities, have been identified. The extracellular domains of the short and long forms of OB-R are identical. An OB-R transcript, lacking a transmembrane domain and potentially encoding a soluble form of the receptor, has also been described. OB-R_L transcripts were reported to be expressed predominantly in regions of the hypothalamus previously thought to be important in body weight regulation. Expression of OB-R_s transcripts have been found in multiple tissues, including the choroid plexus, lung, kidney, and primitive hematopoietic cell populations. OB-R has been shown to be encoded by the mouse diabetes (db) and rat fatty (fa) genes. Rodents homozygous for the db or fa mutations have been known to exhibit an obesity phenotype. Human OB-R long form encodes a 1165 amino acid (aa) precursor protein with a 22 aa signal peptide, an 819 aa extracellular domain, a 21 aa transmembrane domain and a 303 aa cytoplasmic domain. The extracellular domain of OB-R contain two hemopoietin receptor domains, a fibronectin type III domain and the WSXWS domain. Recombinant soluble OB-R has been shown to bind Leptin with high affinity and is a potent Leptin antagonist.

• References:

1. Tartaglia, L.A. et al. (1995) Cell 83:1263.

2. Cioffi, J.A. et al. (1996) Nature Medicine 2:585.

3. Tartaglia, L.A. (1997) J. Biol. Chem. 272:6093.

• Long Name:

  Leptin Receptor

• Entrez Gene IDs:

  3953 (Human); 16847 (Mouse)

• Alternate Names:

  B219; CD295 antigen; CD295; DB; DKFZp686B1731; huB219; LEPR; LEP-R; Leptin R; leptin receptor; LeptinR; OB R; OB receptor; OB-R; OBRCD295