Human FOLR1 Antibody

R&D Systems, part of Bio-Techne | Catalog # AF5646

R&D Systems, part of Bio-Techne
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AF5646
AF5646-SP
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Biotin
BAF5646
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Key Product Details

Validated by

Knockout/Knockdown

Species Reactivity

Validated:

Human

Cited:

Human

Applications

Validated:

CyTOF-ready, Flow Cytometry, Knockout Validated, Western Blot

Cited:

ELISA Capture, ELISA Detection, Flow Cytometry, Western Blot

Label

Unconjugated

Antibody Source

Polyclonal Goat IgG

View all FOLR1 Antibodies »

Product Specifications

Immunogen

Chinese hamster ovary cell line CHO-derived recombinant human FOLR1
Arg25-Met233
Accession # P15328

Specificity

Detects human FOLR1 in direct ELISAs and Western blots. In direct ELISAs, less than 15% cross-reactivity with recombinant mouse (rm) FOLR1 and recombinant human (rh) FOLR3 is observed.

Clonality

Polyclonal

Host

Goat

Isotype

IgG

Scientific Data Images for Human FOLR1 Antibody

Detection of FOLR1 antibody in MCF-7 Human Cell Line antibody by Flow Cytometry.

Detection of FOLR1 in MCF‑7 Human Cell Line by Flow Cytometry.

MCF-7 human breast cancer cell line was stained with Goat Anti-Human FOLR1 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF5646, filled histogram) or control antibody (AB-108-C, open histogram), followed by Allophycocyanin-conjugated Anti-Goat IgG Secondary Antibody (F0108).
Detection of Human FOLR1 antibody by Western Blot.

Detection of Human FOLR1 by Western Blot.

Western blot shows lysates of HeLa human cervical epithelial carcinoma cell line. PVDF membrane was probed with 1 µg/mL of Goat Anti-Human FOLR1 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF5646) followed by HRP-conjugated Anti-Goat IgG Secondary Antibody (HAF017). A specific band was detected for FOLR1 at approximately 37 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.
Western Blot Shows Human FOLR1 Antibody Specificity by Using Knockout Cell Line.

Western Blot Shows Human FOLR1 Specificity by Using Knockout Cell Line.

Western blot shows lysates of HeLa human cervical epithelial carcinoma parental cell line and FOLR1 knockout HeLa cell line (KO). PVDF membrane was probed with 1 µg/mL of Goat Anti-Human FOLR1 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF5646) followed by HRP-conjugated Anti-Goat IgG Secondary Antibody (HAF017). A specific band was detected for FOLR1 at approximately 40 kDa (as indicated) in the parental HeLa cell line, but is not detectable in knockout HeLa cell line. GAPDH (AF5718) is shown as a loading control. This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.
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Applications for Human FOLR1 Antibody

Application
Recommended Usage

CyTOF-ready

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

Flow Cytometry

0.25 µg/106 cells
Sample: MCF‑7 human breast cancer cell line; HeLa human cervical epithelial carcinoma cell line

Knockout Validated

FOLR1 is specifically detected in HeLa human cervical epithelial carcinoma parental cell line but is not detectable in FOLR1 knockout HeLa cell line.

Western Blot

1 µg/mL
Sample: HeLa human cervical epithelial carcinoma cell line

Formulation, Preparation, and Storage

Purification

Antigen Affinity-purified

Reconstitution

Reconstitute at 0.2 mg/mL in sterile PBS. For liquid material, refer to CoA for concentration.

Reconstitution Buffer Available:
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Formulation

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.

Shipping

Lyophilized product is shipped at ambient temperature. Liquid small pack size (-SP) is shipped with polar packs. Upon receipt, store immediately at the temperature recommended below.

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: FOLR1

Folate Receptor 1 (FOLR1), also known as Folate Receptor alpha and Folate Binding Protein (FBP), is a 37‑42 kDa protein that mediates the cellular uptake of folic acid and reduced folates. Dietary folates are required for many key metabolic processes including nucleotide and methionine synthesis, the interconversion of glycine and serine, and histidine breakdown (1, 2). Mature FOLR1 is an N-glycosylated protein that is anchored to the cell surface by a GPI linkage (3‑6). Human FOLR1 shares 83% amino acid sequence identity with mouse and rat FOLR1. FOLR1 is predominantly expressed on epithelial cells and is dramatically upregulated on many carcinomas (7, 8). It is critically required during early embryogenesis as shown in knockout mice which die in utero with gross morphological defects (9). FOLR1 is internalized to the endosomal system where it dissociates from its ligand before recycling to the cell surface (6, 10). A soluble form of FOLR1 can be proteolytically shed from the cell surface into the serum and breast milk (11).

References

  1. Kelemen, L.E. (2006) Int. J. Cancer 119:243.
  2. Fowler, B. et al. (2001) Kidney Int. 59:S-221.
  3. Luhrs, C.A. et al. (1989) J. Biol. Chem. 264:21446.
  4. Lacey, S.W. et al. (1989) J. Clin. Invest. 84:715.
  5. Elwood, P.C. (1989) J. Biol. Chem. 264:14893.
  6. Rijnboutt, S. et al. (1996) J. Cell Biol. 132:35.
  7. Ross, J.F. et al. (1994) Cancer 73:2432.
  8. Parker, N. et al. (2005) Anal. Biochem. 338:284.
  9. Piedrahita, J.A. et al. (1999) Nat. Genet. 23:228.
  10. Paulos, C.M. et al. (2004) Mol. Pharmacol. 66:1406.
  11. Elwood, P.C. et al. (1991) J. Biol. Chem. 26:2346.

Long Name

Folate Receptor 1

Alternate Names

FBP, Folbp1, FR-alpha, MOv18

Entrez Gene IDs

2348 (Human); 14275 (Mouse); 171049 (Rat)

Gene Symbol

FOLR1

UniProt

P15328 (Human)

Additional FOLR1 Products

Product Documents for Human FOLR1 Antibody

Product Datasheets

Certificate of Analysis

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Product Specific Notices for Human FOLR1 Antibody

For research use only

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