Recombinant Human FOLR3 Protein, CF

Catalog # Availability Size / Price Qty
5319-FR-050
R&D Systems Recombinant Proteins and Enzymes
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Recombinant Human FOLR3 Protein, CF Summary

Product Specifications

Purity
>90%, by SDS-PAGE under reducing conditions and visualized by silver stain
Endotoxin Level
<0.01 EU per 1 μg of the protein by the LAL method.
Activity
Measured by its binding ability in a functional ELISA. When Folic Acid-Bovine Serum Albumin is coated at 5 μg/mL (100 μL/well), the concentration of rhFOLR-3 that produces 50% of the optimal binding response is found to be approximately 0.2 -1 nM.
Source
Mouse myeloma cell line, NS0-derived human FOLR3 protein
Ala22-Ser245 & Ser26-Ser245 both with a C-terminal 6-His tag
Accession #
N-terminal Sequence
Analysis
Ala22 & Ser26
Predicted Molecular Mass
26 kDa
SDS-PAGE
30-40 kDa, reducing conditions

Product Datasheets

Carrier Free

What does CF mean?

CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.

What formulation is right for me?

In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.

5319-FR

Formulation Lyophilized from a 0.2 μm filtered solution in PBS.
Reconstitution Reconstitute at 100 μg/mL in PBS.
Shipping The product is shipped at ambient temperature. Upon receipt, store it 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.
  • 3 months, -20 to -70 °C under sterile conditions after reconstitution.
Reconstitution Calculator

Reconstitution Calculator

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.

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Background: FOLR3

Folate receptor 3 (FOLR3), also known as folate receptor gamma, is a 32 kDa protein that binds 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). Mature FOLR3 is a glycosylated protein that contains an imperfect carboxy terminal GPI anchor sequence (2, 3). A fraction of FOLR3 is GPI-linked to the cell surface, but the majority is released as a secreted protein (2). Mature human FOLR3 shares 74% and 83% amino acid (aa) sequence identity with FOLR1 and FOLR2, respectively. Orthologs of human FOLR3 have not been described in mouse or rat. A genetic polymorphism generates a truncated isoform that lacks the carboxy terminal 139 aa (2, 4). FOLR3 is expressed by cells of the myelocyte and B lymphocyte lineage as well as by various carcinomas (2, 3). FOLR3 is more highly expressed in ovarian carcinomas than in breast carcinomas or mesotheliomas (5). Unlike other folate receptors, FOLR3 does not exhibit stereoselectivity in the binding of folates (3).

References
  1. Fowler, B. et al. (2001) Kidney Int. 59:S-221.
  2. Shen, F. et al. (1994) Biochemistry 33:1209.
  3. Shen, F. et al. (1995) Biochemistry 34:5660.
  4. Wang, H. et al. (1998) Nucl. Acids Res. 26:2132.
  5. Yuan, Y. et al. (2009) Hum. Pathol. May 18 epub.
Long Name
Folate Receptor 3
Entrez Gene IDs
2352 (Human)
Alternate Names
folate receptor 3 (gamma); Folate receptor 3; folate receptor gamma; FOLR3; FR-G; FR-gamma; gamma-hFR

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