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AB270212

Human LDLR ELISA Kit

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Human LDLR ELISA Kit is a single-wash 90-min SimpleStep Sandwich ELISA used to quantify Human LDLR with a sensitivity of 55.8 pg/mL. The assay uses a simple mix-wash-read protocol with just one incubation and one wash step.

- Colorimetric sandwich ELISA - 450 nm readout, works on any plate reader
- Validated on a broad range of sample types including urine, serum, plasma, cell culture supernatant, cell lysate
- Need to design your own assay: we also provide the conjugation-ready antibody pair

View Alternative Names

Low-density lipoprotein receptor, LDL receptor, LDLR

6 Images
ELISA - Human LDLR ELISA Kit (AB270212)
  • ELISA

Supplier Data

ELISA - Human LDLR ELISA Kit (AB270212)
Sandwich ELISA - Human LDLR ELISA Kit (AB270212)
  • sELISA

Supplier Data

Sandwich ELISA - Human LDLR ELISA Kit (AB270212)

Interpolated concentrations of native LDLR in HepG2 cell extract based on a 200 μg/mL extract load.

The concentrations of LDLR were measured in duplicate and interpolated from the LDLR standard curve and corrected for sample dilution. The interpolated dilution factor corrected values are plotted (mean +/- SD, n=2). The mean LDLR concentration was determined to be 11.8 ng/mL in sample.

Sandwich ELISA - Human LDLR ELISA Kit (AB270212)
  • sELISA

Supplier Data

Sandwich ELISA - Human LDLR ELISA Kit (AB270212)

Example of human LDLR standard curve in Sample Diluent NS. as described in Section 10.

The LDLR standard curve was prepared as described in Section 10. Raw data values are shown in the table. Background-subtracted data values (mean +/- SD) are graphed.

Sandwich ELISA - Human LDLR ELISA Kit (AB270212)
  • sELISA

Supplier Data

Sandwich ELISA - Human LDLR ELISA Kit (AB270212)

Interpolated concentrations of native LDLR in human serum and plasma samples.

The concentrations of LDLR were measured in duplicates, interpolated from the LDLR standard curves and corrected for sample dilution. Undiluted samples are as follows : serum 25%, plasma (citrate) 25%, plasma (EDTA) 25%, and plasma (heparin) 25%. The interpolated dilution factor corrected values are plotted (mean +/- SD, n=2). The mean LDLR concentration was determined to be 34.6 ng/mL in serum, 41.6 ng/mL in plasma (citrate) and 24.9 ng/mL in plasma (EDTA), and 31.4 ng/mL in plasma (heparin).

Sandwich ELISA - Human LDLR ELISA Kit (AB270212)
  • sELISA

Supplier Data

Sandwich ELISA - Human LDLR ELISA Kit (AB270212)

Interpolated concentrations of native LDLR in human urine and cell culture supernatant samples.

The concentrations of LDLR were measured in duplicates, interpolated from the LDLR standard curves and corrected for sample dilution. Undiluted samples are as follows : urine 2% and HepG2 cell culture supernatant 25%. The interpolated dilution factor corrected values are plotted (mean +/- SD, n=2). The mean LDLR concentration was determined to be 223.5 ng/mL in urine and 28.0 ng/mL in HepG2 cell culture supernatant.

Sandwich ELISA - Human LDLR ELISA Kit (AB270212)
  • sELISA

Supplier Data

Sandwich ELISA - Human LDLR ELISA Kit (AB270212)

Serum from nine individual healthy human female donors was measured in duplicate.

Interpolated dilution factor corrected values are plotted (mean +/- SD, n=2). The mean LDLR concentration was determined to be 65 ng/mL with a range of 38 – 115 ng/mL.

Key facts

Detection method

Colorimetric

Sample types

Urine, Heparin Plasma, Citrate plasma, Cell culture supernatant, Serum, Cell Lysate, EDTA Plasma

Reacts with

Human

Assay type

Sandwich

Results type

Quantitative

Sensitivity

= 55.8 pg/mL

Range

187.5 - 12000 pg/mL

Assay time

1h 30m

Assay Platform

Pre-coated microplate (12 x 8 well strips)

Reactivity data

{ "title": "Reactivity Data", "filters": { "stats": ["", "Reactivity", "Dilution Info", "Notes"] }, "values": { "sELISA": { "reactivity":"TESTED_AND_REACTS", "dilution-info":"", "notes":"<p></p>" } } }

Product details

Human LDLR ELISA Kit ab270212 is a rapid single-wash 90-min ELISA kit to measure Human LDLR in cell culture supernatant, cell lysates, urine, serum and plasma.

How the assay works
Human LDLR SimpleStep ELISA® employs capture antibodies conjugated to an affinity tag that is recognized by the monoclonal antibody used to coat our SimpleStep ELISA® plates. This approach to sandwich ELISA allows the formation of the antibody-analyte sandwich complex in a single step, significantly reducing assay time. See the SimpleStep ELISA® protocol summary in the image section for further details.

Assay Specificity
This kit recognizes both native and recombinant human alpha 1 Antitrypsin protein in serum and plasma. Normal human urine and saliva samples tested negative for this kit. Cell culture supernatant, milk, CSF, cell extract, and tissue extract samples have not been tested with this kit.
Human alpha 1 Anti-chymotrypsin protein and human PAI protein were prepared at 2,000 ng/mL and 1,000 ng/mL respectively and assayed for cross reactivity. No cross-reactivity was observed.
Human alpha 1 Anti-chymotrypsin protein and human PAI protein were prepared at 2,000 ng/mL and 1,000 ng/mL respectively and assayed for and tested for interference. No interference with was observed.
This immunoassay is calibrated against a highly purified human alpha 1 Antitrypsin. The NIBSC/WHO unclassified purified human alpha 1 Antitrypsin preparation 05/162 was evaluated in this kit. The dose response curve of the unclassified standard alpha 1 Antitrypsin parallels the SimpleStep standard curve. To convert sample values obtained with the SimpleStep Human alpha 1 Antitrypsin kit to approximate NIBSC 05/162 units, use the equation below.
NIBSC (05/162) approximate value (ng/mL) = 0.3649 x SimpleStep Human alpha 1 Antitrypsin value (ng/mL).

Human LDLR ELISA Kit ab270212 protocol summary:
1. Mix: add samples/standards to the wells together with the capture and detector antibody cocktail. Incubate for 1 hr at room temperature
2. Wash
3. Add TMB development solution - incubate for 10 min
4. Add stop solution
5. Read the results on a plate reader at 450nm

Design your own immunoassay
We offer the antibody pair used in this kit in a BSA and Azide-free format, ready for conjugation
- Human LDLR Antibody Pair - BSA and Azide free ab253310
- Anti-LDL Receptor antibody [EPR22296-56] - BSA and Azide free (Capture) ab272291
- Anti-LDL Receptor antibody [EPR22296-103] - BSA and Azide free (Detector) ab272292

Related and recommended products
Human LDLR ELISA Kit ab270212 is commonly used to study cardiovascular diseases and lipid metabolism.

Other ELISA kits to measure lipid metabolism are:
- Human PCSK9 ELISA kit ab190806
- Human HDL ELISA kit ab125961

Low-density lipoprotein receptor (LDLR) is well known receptor found clustered in clathrin-coated pits. LDLR mediates the endocytosis of low-density lipoprotein (LDL) and maintains the plasma level of LDL. Studies have shown LDLR as a primary method of entry for vesicular stomatitis virus in humans. Also reported other viruses such as hepatitis C entering the cells indirectly by association with LDL via LDLR-mediated endocytosis.

REACH authorisation
Abcam has not and does not intend to apply for the REACH Authorisation of customers' uses of products that contain European Authorisation list (Annex XIV) substances.
It is the responsibility of our customers to check the necessity of application of REACH Authorisation, and any other relevant authorisations, for their intended uses.

Precision

[ { "reproducibilityType": "Inter", "sample": "Serum", "replicates": 3, "mean": null, "standardDeviation": null, "coefficientOfVariability": "3.64" }, { "reproducibilityType": "Intra", "sample": "Serum", "replicates": 8, "mean": null, "standardDeviation": null, "coefficientOfVariability": "3.5" } ]

Recovery

[ { "sample": "Serum", "range": "93 - 100 %", "average": "= 96" }, { "sample": "EDTA Plasma", "range": "88 - 94 %", "average": "= 92" }, { "sample": "Urine", "range": "97 - 100 %", "average": "= 98" }, { "sample": "Heparin Plasma", "range": "83 - 90 %", "average": "= 87" }, { "sample": "Citrate plasma", "range": "96 - 108 %", "average": "= 102" } ]

What's included?

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Properties and storage information

Shipped at conditions
Blue Ice
Appropriate short-term storage conditions
+4°C
Appropriate long-term storage conditions
+4°C
Storage information
+4°C

Supplementary information

This supplementary information is collated from multiple sources and compiled automatically.

The LDL Receptor also called LDLR is a protein that plays an important role in the uptake and clearance of low-density lipoproteins (LDL) from the bloodstream. LDLR binds LDL particles facilitating their internalization through receptor-mediated endocytosis. This receptor is expressed mainly in the liver adrenal glands and other tissues involved in cholesterol metabolism. It has an approximate molecular weight of 160 kDa. Researchers often study LDLR using techniques like Western blotting to understand its presence and function.
Biological function summary

The LDL receptor interacts with LDL particles to regulate cholesterol levels in the body. It is part of a cell surface complex that recognizes and binds to apolipoprotein B-100 or apolipoprotein E present on LDL. This interaction initiates internalization of LDL leading to its degradation in lysosomes where cholesterol can be released and used by the cell. Mutations in the gene encoding LDLR can lead to inefficient cholesterol uptake influencing various metabolic processes.

Pathways

LDL receptor activities are integral to lipid metabolism and cholesterol homeostasis. Two important biological pathways that involve LDLR include the cholesterol biosynthesis pathway and the lipoprotein clearance pathway. Within these pathways LDLR collaborates closely with proteins like PCSK9 which modulates its expression and degradation and HMG-CoA reductase an important enzyme in cholesterol synthesis to balance cholesterol levels in the body.

Defects in the LDL receptor are strongly associated with familial hypercholesterolemia and atherosclerosis. These conditions arise from impaired clearance of LDL leading to elevated cholesterol levels which pose risks for cardiovascular diseases. LDLR dysfunctions are linked with the Protein PCSK9 whose gain-of-function mutations can exacerbate hypercholesterolemia by promoting degradation of LDLR while statins aim to increase LDLR expression to lower LDL cholesterol levels.

Product protocols

Target data

Binds low density lipoprotein /LDL, the major cholesterol-carrying lipoprotein of plasma, and transports it into cells by endocytosis. In order to be internalized, the receptor-ligand complexes must first cluster into clathrin-coated pits. Forms a ternary complex with PGRMC1 and TMEM97 receptors which increases LDLR-mediated LDL internalization (PubMed : 30443021).. (Microbial infection) Acts as a receptor for hepatitis C virus in hepatocytes, but not through a direct interaction with viral proteins.. (Microbial infection) Acts as a receptor for Vesicular stomatitis virus.. (Microbial infection) In case of HIV-1 infection, may function as a receptor for extracellular Tat in neurons, mediating its internalization in uninfected cells.. (Microbial infection) Acts as a receptor for Crimean-Congo hemorrhagic fever virus (CCHFV).. (Microbial infection) Acts as a receptor for many Alphavirus, including Getah virus (GETV), Ross river virus (RRV) and Semliki Forest virus.
See full target information Low-density lipoprotein receptor
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