Human Pref-1/DLK1/FA1 Antibody

Catalog # Availability Size / Price Qty
Detection of Human Pref‑1/DLK1/FA1 by Western Blot.
2 Images
Product Details
Citations (1)
Supplemental Products

Human Pref-1/DLK1/FA1 Antibody Summary

Species Reactivity
Detects human Pref-1/DLK-1/FA1 in direct ELISAs and Western blots.
Polyclonal Goat IgG
Antigen Affinity-purified
Mouse myeloma cell line NS0-derived recombinant human Pref-1 long isoform
Ala24-Pro297 with Arg248Pro and Lys295Ser substitutions
Accession # AAA75364
Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied either lyophilized or as a 0.2 µm filtered solution in PBS.
Endotoxin Level
<0.10 EU per 1 μg of the antibody by the LAL method.


Recommended Concentration
Western Blot
1 µg/mL
See below
5-15 µg/mL
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.

Scientific Data

Western Blot Detection of Human Pref-1/DLK1/FA1 antibody by Western Blot. View Larger

Detection of Human Pref‑1/DLK1/FA1 by Western Blot. Western blot shows lysates of human adrenal gland tissue and human placenta tissue. PVDF membrane was probed with 1 µg/mL of Goat Anti-Human Pref-1/DLK1/FA1 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF1144) followed by HRP-conjugated Anti-Goat IgG Secondary Antibody (Catalog # HAF017). A specific band was detected for Pref-1/DLK1/FA1 at approximately 45-60 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.

Immunocytochemistry Pref-1/DLK1/FA1 antibody in HepG2 Human Cell Line by Immunocytochemistry (ICC). View Larger

Pref‑1/DLK1/FA1 in HepG2 Human Cell Line. Pref-1/DLK1/FA1 was detected in immersion fixed HepG2 human hepatocellular carcinoma cell line using Goat Anti-Human Pref-1/DLK1/FA1 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF1144) at 10 µg/mL for 3 hours at room temperature. Cells were stained using the NorthernLights™ 557-conjugated Anti-Goat IgG Secondary Antibody (red; Catalog # NL001) and counterstained with DAPI (blue). Specific staining was localized to cytoplasm. View our protocol for Fluorescent ICC Staining of Cells on Coverslips.

Reconstitution Calculator

Reconstitution Calculator

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Preparation and Storage

Reconstitute at 0.2 mg/mL in sterile PBS.
Reconstitution Buffer Available
Reconstitution Buffer 1 (PBS)
Catalog #
Size / Price
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: Pref-1/DLK1/FA1

Pref-1 (Preadipocyte factor 1; also DLK-1 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

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Citation for Human Pref-1/DLK1/FA1 Antibody

R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.

1 Citation: Showing 1 - 1

  1. Distinct fibroblast lineages determine dermal architecture in skin development and repair.
    Authors: Driskell R, Lichtenberger B, Hoste E, Kretzschmar K, Simons B, Charalambous M, Ferron S, Herault Y, Pavlovic G, Ferguson-Smith A, Watt F
    Nature, 2013;504(7479):277-81.
    Species: Mouse
    Sample Types: Whole Tissue
    Applications: IHC-Fr


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Reconstitution Buffers

Secondary Antibodies

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