• Species Reactivity

  Human, Mouse

• Specificity

  Detects human and mouse PBEF/Visfatin in direct ELISAs and Western blots. In direct ELISAs and Western blots, 100% cross-reactivity with recombinant human PBEF is observed.

• Source

  Monoclonal Rat IgG2a Clone # 362616

• Immunogen

  Mouse myeloma cell line NS0-derived recombinant mouse PBEF/Visfatin    
  Met1-His491    
  Accession # Q99KQ4

• Formulation

  Supplied 0.2 mg/mL in a saline solution containing BSA and Sodium Azide.

• Label

  Alexa Fluor 750

Applications

• Recommended    
  Concentration

  Sample

• Intracellular Staining by Flow Cytometry

  0.25-1 µg/10    ⁶ cells

  3T3‑L1 mouse embryonic fibroblast adipose‑like cell line fixed with paraformaldehyde and permeabilized with saponin

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

Preparation and Storage

• Shipping

  The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.

• Stability & Storage

  Store the unopened product at 2 - 8 °C. Do not use past expiration date.

Background: PBEF/Visfatin

PBEF, also called Nampt or visfatin, is a ubiquitous 52 kDa nicotinamide phosphoribosyltransferase. It is the rate-limiting component in the biosynthesis of NAD  ⁺, and functions in the cytoplasm to regulate energy metabolism during stress responses and immune activation. Although it lacks a signal sequence, PBEF appears to be secreted by visceral adipose tissue and functions as a noncompetitive insulin mimetic. Mouse PBEF shows 96% and > 99% aa identity with human and rat PBEF, respectively.

• Long Name:

  Pre-B-Cell Colony-Enhancing Factor 1

• Entrez Gene IDs:

  10135 (Human); 59027 (Mouse); 297508 (Rat)

• Alternate Names:

  EC 2.4.2.12; MGC117256; NAmPRTase; NAMPT; nicotinamide phosphoribosyltransferase; NMPRTase; PBEF; PBEF1; PBEF1110035O14Rik; PBEF1DKFZp666B131; Pre-B cell-enhancing factor; pre-B-cell colony enhancing factor 1; Pre-B-cell colony-enhancing factor 1; VF; Visfatin