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Human Apolipoprotein B/ApoB Quantikine ELISA Kit

  • Assay Type
    Solid Phase Sandwich ELISA
  • Format
    96-well strip plate
  • Assay Length
    4.5 hours
  • Sensitivity
    9.97 ng/mL
  • Assay Range
    39.10 - 2,500 ng/mL (Serum, EDTA Plasma, Heparin Plasma,)
  • Specificity
    Natural human ApoB
  • Cross-reactivity
    < 0.5% cross-reactivity observed with available related molecules.< 50% cross-species reactivity observed with species tested.
  • Interference
    No significant interference observed with available related molecules.
Control Available
Product Summary
The Quantikine Human Apolipoprotein B/ApoB Immunoassay is a 4.5 hour solid phase ELISA designed to measure ApoB levels in serum and plasma.

Precision
Intra-Assay Precision (Precision within an assay) Three samples of known concentration were tested in separate assays to assess inter-assay precision.
Inter-Assay Precision (Precision between assays Three samples of known concentration were tested on one plate to assess intra-assay precision.
Serum, EDTA Plasma, Heparin Plasma
Intra-Assay Precision Inter-Assay Precision
Sample123123
n202020202020
Mean28465412282617171375
Standard Deviation1533.648.127.461.290.5
CV%5.35.13.910.58.56.6

Linearity
To assess the linearity of the assay, samples containing high concentrations of ApoB were serially diluted with Calibrator Diluent to produce samples with values within the dynamic range of the assay.
Human Apolipoprotein B/ApoB Quantikine ELISA Kit
Background: Apolipoprotein B/ApoB

The apolipoproteins are a structurally-unrelated group of proteins that have some association with the transport of lipids in blood. Apolipoproteins, plus phospholipids, cholesterol and triglycerides, form spherical particles with a lipid/hydrophobic center and a (apolipo)protein coat. The apolipoprotein coat promotes aqueous solubility and serves as a ligand for lipoprotein receptors. HDL may contain apolipoproteins A, C, D, E, J, L and M, while LDL contains apolipoproteins B and E.

ApoAI and ApoA2 are major protein components of serum high-density lipoprotein (HDL) and are produced by the liver and small intestine. They are involved in reverse cholesterol transport from tissues to the liver. Polymorphisms of ApoA2 are associated with disorders of cholesterol and fatty acid metabolism. Human ApoB (Apolipoprotein B-100) is a 550 kDa, secreted, palmitoylated glycoprotein that is part of LDL and VLDL particles. It is made by liver and is 4536 aa in length. It binds LDL to the ApoB/E receptor. ApoC activates lipoprotein lipase and may self-associate to form amyloid-type fibrils.

ApoE is a 34 kDa protein component of serum chylomicrons, VLDL, and HDL particles. It mediates the binding, uptake, and catabolism of these particles through interactions with the ApoE receptor and LDL receptors in the liver and brain. ApoE is important in fatty acid homeostasis and memory formation. Polymorphisms encode three variants (ApoE2, 3, 4) which are differentially related to the development of atherosclerosis and neurogenerative disorders, particularly Alzheimer's disease.

Serum amyloid A proteins (SAAs) are a family of homologous apolipoproteins of high density lipoprotein (HDL). They can be divided into two groups. The first group consists of the acute phase SAA1 and SAA2 that associate with HDL during inflammation and remodel the HDL particle by displacing apolipoprotein A1. The second group consists of constitutively expressed SAA4 and SAA5 that exist as minor apolipoproteins on HDL but make up more than 90% of the total SAA during homeostasis.

    • Entrez Gene IDs
      338 (Human); 238055 (Mouse); 54225 (Rat);
    • Alternate Names
      APOB; FLDB; Apo B-100; apoB-100; apoB-48; apolipoprotein B (including Ag(x) antigen); apolipoprotein B-100; apolipoprotein B48; FLDB; LDLCQ4; mutant Apo B 100;
    Related Research Areas
    Assay Procedure
    Refer to the product for complete assay procedure.

    Bring all reagents and samples to room temperature before use. It is recommended that all samples, standards, and controls be assayed in duplicate.
    1.   Prepare all reagents, standard dilutions, and samples as directed in the product insert.
    2.   Remove excess microplate strips from the plate frame, return them to the foil pouch containing the desiccant pack, and reseal.

    3. 200 µL Assay Diluent
    4.   Add 200 µL of Assay Diluent to each well.

    5. 50 µL Standard, Control, or Sample
    6.   Add 50 µL of Standard, control, or sample to each well. Cover with a plate sealer, and incubate at room temperature for 2 hours on a horizontal orbital microplate shaker.
    7.   Aspirate each well and wash, repeating the process 2 times for a total of 3 washes.

    8. 200 µL Conjugate
    9.   Add 200 µL of Conjugate to each well. Cover with a new plate sealer, and incubate at room temperature for 2 hours on the shaker.
    10.   Aspirate and wash 3 times.

    11. 200 µL Substrate Solution
    12.   Add 200 µL Substrate Solution to each well. Incubate at room temperature for 30 minutes on the benchtop. PROTECT FROM LIGHT.

    13. 50 µL Stop Solution
    14.   Add 50 µL of Stop Solution to each well. Read at 450 nm within 30 minutes. Set wavelength correction to 540 nm or 570 nm.

    FAQs

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