Human Pref-1/DLK1/FA1 Alexa Fluor® 488-conjugated Antibody

  • Species Reactivity
  • Specificity
    Detects human Pref‑1/DLK1/FA1 in direct ELISAs and Western blots. Shows approximately 50% cross-reactivity with recombinant mouse Pref‑1/DLK1/FA1.
  • Source
    Monoclonal Mouse IgG2B Clone # 211309
  • Purification
    Protein A or G purified from hybridoma culture supernatant
  • Immunogen
    Mouse myeloma cell line NS0-derived recombinant human Pref-1/DLK1/FA1 long isoform
    Ala24-Pro297 (with Arg248Pro and Lys295Ser substitutions)
    Accession # P80370
  • Formulation
    Supplied in a saline solution containing BSA and Sodium Azide.
  • Label
    Alexa Fluor 488
  • Flow Cytometry
    5 µL/106 cells
    See below
Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.
Data Examples

Detection of Pref‑1/DLK1/FA1 in HepG2 Human Cell Line by Flow Cytometry. HepG2 human hepatocellular carcinoma cell line was stained with Mouse Anti-Human Pref‑1/DLK1/FA1 Alexa Fluor® 488‑conjugated Monoclonal Antibody (Catalog # FAB1144G, filled histogram) or isotype control antibody (Catalog # IC0041G, open histogram). View our protocol for Staining Membrane-associated Proteins.

Preparation and Storage
  • Shipping
    The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.
  • Stability & Storage
    Protect from light. Do not freeze.
    • 12 months from date of receipt, 2 to 8 °C as supplied.
Background: Pref-1/DLK1/FA1
Pref-1 (Preadipocyte Factor 1), also known as DLK1 and FA1, is a 58-65 kDa member of the Notch/Serrata/Delta family of proteins.  It is expressed in prechondrocytes and preadipocytes and appears to block progenitor cell differentiation into mature cell lineages.  Mature human Pref-1 is a 360 amino acid (aa) type I transmembrane N- and O-linked glycoprotein.  It contains a 280 aa extracellular region (aa 24-303), a 24 aa transmembrane segment (aa 304-327), and a 56 aa cytoplasmic domain (aa 328-383).  The extracellular region contains six EGF-like domains, and undergoes proteolytic cleavage to generate a bioactive 50 kDa fragment, plus three 25-31 kDa fragments that show no activity.  There are multiple potential splice variants.  One shows a deletion of aa 229-301, a second possesses a six aa substitution for aa 1-52, a third shows a deletion of aa 210-277, while a fourth contains a six aa substitution for aa 207-383.  Over aa 24-297, human Pref-1 shares 82% aa identity with mouse Pref-1.
  • Long Name:
    Preadipocyte Factor-1/Protein delta Homolog 1/Fetal Antigen 1
  • Entrez Gene IDs:
    8788 (Human); 13386 (Mouse)
  • Alternate Names:
    delta-like 1 homolog (Drosophila); DLK; DLK1; DLK-1; FA1; FA1fetal antigen 1; pG2; pG2delta-like homolog (Drosophila); preadipocyte factor 1; Pref1; Pref-1; protein delta homolog 1; secredeltin; ZOG
Related Research Areas
Isotype Controls
Description Application Cat# Citations Images  

Mouse IgG2B Alexa Fluor® 488-conjugated Isotype Control

Ctrl IC0041G 2  
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Staining Reagents
Description Application Cat# Citations Images  

Flow Cytometry Staining Buffer (1X)

Flow FC001 6
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Flow Cytometry Mouse Lyse Buffer (10X)

Flow FC003 4
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Flow Cytometry Human Lyse Buffer (10X)

Flow FC002 1
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