Recombinant Human Megalin/LRP-2 (C3) Protein, CF

Catalog # Availability Size / Price Qty
The Innovator Series.
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Product Details
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Recombinant Human Megalin/LRP-2 (C3) Protein, CF Summary

Product Specifications

>85%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
Endotoxin Level
<1.0 EU per 1 μg of the protein by the LAL method.
Bioassay data are not available.
Mouse myeloma cell line, NS0-derived human Megalin/LRP2 protein
Glu2698-Gly3110, with a C-terminal 6-His tag
Accession #
N-terminal Sequence
Predicted Molecular Mass
47 kDa
82-95 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.


Formulation Lyophilized from a 0.2 μm filtered solution in PBS.
Reconstitution Reconstitute at 250 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.

Data Image

Bioactivity not tested The Innovator Series. View Larger

R&D Systems proteins are almost always sold with a bioassay to indicate activity. However, we recognize that sometimes proteins might be novel, and their bioactivity may not be well understood. In addition, some researchers may wish to use polypeptides to make antibodies. To facilitate the advancement of new science, we now offer our Innovator Series of proteins.

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.


Background: Megalin/LRP2

Megalin, also known as the low-density lipoprotein receptor-related protein 2 (LRP2), is a large type I transmembrane cell surface protein. This glycoprotein is a multi‑ligand endocytic receptor that is expressed in many different tissues but primarily in absorptive epithilial tissues such as the kidney (1). The Megalin protein is critical for the reuptake of numerous ligands, including lipoproteins, sterols, vitamin-binding proteins, and hormones. This protein also has a role in cell-signaling. Mutations in this gene cause Donnai-Barrow Syndrome (DBS) and Facio-Oculoacoustico-Renal Syndrome (FOAR) (1). Megalin is consisting of a 25 amino acid (aa) probable N‑terminal signal peptide sequence, a 4400 aa extracellular region, a 22 aa single transmembrane domain, and a 213 aa C‑terminal cytoplasmic tail. The entire extracellular region is made up of 36 class A motifs of putative ligand-binding domains arranged in four distinct clusters, 16 growth factor repeats separated by 8 YWTD spacer regions, and 1 epidermal growth factor-like repeat (2). The extracellular ligand-binding-domains bind diverse macromolecules including albumin, apolipoproteins B and E, and lipoprotein lipase (3). The amino acid 2698-3110 encodes the third class A motif cluster in human Megalin, termed Megalin C3. Human Megalin C3 shares 77% and 74% identity with mouse and rat Megalin C3.

  1. Christensen, E. I. and Birn, H. (2002) Nat. Rev. Mol. Cell Biol 3:256.
  2. Saito, A. et al. (1994) Proc. Natl. Acad. Sci. U. S. A. 91:9725
  3. Kantarci, S. et al. (2007) Nat. Genet 39:957.
Long Name
LDL Receptor-related Protein 2
Entrez Gene IDs
4036 (Human); 14725 (Mouse); 29216 (Rat)
Alternate Names
calcium sensor protein; DBS; DBSlow-density lipoprotein receptor-related protein 2; EC; EC; Glycoprotein 330; gp330; Heymann nephritis antigen homolog; low density lipoprotein receptor-related protein 2; LRP2; LRP-2; Megalin


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