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Your Position: Home > Protein > LDL R > LDR-R5255

Rabbit LDL R Protein, Fc Tag

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  • Synonym
    LDLR,FH,FHC,LDLCQ2
  • Source
    Rabbit LDL R, Fc Tag(LDR-R5255) is expressed from human 293 cells (HEK293). It contains AA Ala 9 - Gly 765 (Accession # P20063-1).
  • Molecular Characterization
    LDL R Structure

    This protein carries a human IgG1 Fc tag at the C-terminus.

    The protein has a calculated MW of 109.2 kDa. The protein migrates as 120-140 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.

  • Endotoxin
    Less than 1.0 EU per μg by the LAL method.
  • Purity

    >90% as determined by SDS-PAGE.

  • Formulation

    Lyophilized from 0.22 μm filtered solution in Tris with Glycine, Arginine and NaCl, pH7.5 with trehalose as protectant.

    Contact us for customized product form or formulation.

  • Reconstitution

    Please see Certificate of Analysis for specific instructions.

    For best performance, we strongly recommend you to follow the reconstitution protocol provided in the CoA.

  • Storage

    For long term storage, the product should be stored at lyophilized state at -20°C or lower.

    Please avoid repeated freeze-thaw cycles.

    This product is stable after storage at:

    1. -20°C to -70°C for 12 months in lyophilized state;
    2. -70°C for 3 months under sterile conditions after reconstitution.
SDS-PAGE
LDL R SDS-PAGE

Rabbit LDL R, Fc Tag on SDS-PAGE under reducing (R) condition. The gel was stained with Coomassie Blue. The purity of the protein is greater than 90%.

Bioactivity-ELISA
 LDL R ELISA

Immobilized Human PCSK9 Propeptide & Rabbit Mature PCSK9 (154-686), His Tag at 2 μg/mL (100 μL/well) can bind Rabbit LDL R, Fc Tag (Cat. No. LDR-R5255) with a linear range of 2-78 ng/mL (QC tested).

Bioactivity-BLI
 LDL R BLI

Loaded Rabbit LDL R, Fc Tag (Cat. No. LDR-R5255) on Protein A Biosensor, can bind Human Apolipoprotein E, His Tag (Cat. No. APE-H5246) with an affinity constant of 56.1 nM as determined in BLI assay (ForteBio Octet Red96e) (Routinely tested).

 LDL R BLI

Loaded Rabbit LDL R, Fc Tag (Cat. No. LDR-R5255) on Protein A Biosensor, can bind Human Apolipoprotein E, His Tag (Cat. No. APE-5256) with an affinity constant of 38.5 nM as determined in BLI assay (ForteBio Octet Red96e) (Routinely tested).

  • Background
    Low-Density Lipoprotein (LDL) Receptor is also known as LDLR, FH, FHC, LDLCQ2, and is a mosaic protein of ~840 amino acids (after removal of signal peptide) that mediates the endocytosis of cholesterol-rich LDL. It is a cell-surface receptor that recognizes the apoprotein B100 which is embedded in the phospholipid outer layer of LDL particles. The receptor also recognizes the apoE protein found in chylomicron remnants and VLDL remnants (IDL). It belongs to the Low density lipoprotein receptor gene family. LDL receptor complexes are present in clathrin-coated pits (or buds) on the cell surface, which when bound to LDL-cholesterol via adaptin, are pinched off to form clathrin-coated vesicles inside the cell. This allows LDL-cholesterol to be bound and internalized in a process known as endocytosis and prevents the LDL just diffusing around the membrane surface. This occurs in all nucleated cells (not erythrocytes), but mainly in the liver which removes ~70% of LDL from the circulation. Synthesis of receptors in the cell is regulated by the level of free intracellular cholesterol; if it is in excess for the needs of the cell then the transcription of the receptor gene will be inhibited. LDL receptors are translated by ribosomes on the endoplasmic reticulum and are modified by the Golgi apparatus before travelling in vesicles to the cell surface. LDL is directly involved in the development of atherosclerosis, due to accumulation of LDL-cholesterol in the blood. Atherosclerosis is the process responsible for the majority of cardiovascular diseases.
  • Clinical and Translational Updates

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  • Latest Research Phase:Phase 2 Clinical

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