Active Apolipoprotein A4 (APOA4)
ApoA-IV; ApoAIV; Apo-A4
- UOM
- FOB US$ 260.00 US$ 650.00 US$ 1,300.00 US$ 3,900.00 US$ 9,750.00
- Quantity
Overview
Properties
- Product No.APB967Hu02
- Organism SpeciesHomo sapiens (Human) Same name, Different species.
- ApplicationsCell culture; Activity Assays.
Research use only - DownloadInstruction Manual
- CategoryMetabolic pathwayEndocrinologyCardiovascular biologyHepatologyGastroenterologyNutrition metabolism
- Buffer FormulationPBS, pH7.4, containing 0.01% SKL, 5% Trehalose.
- Traits Freeze-dried powder, Purity > 80%
- Isoelectric Point5.2
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Activity test

Apolipoprotein A4 (APOA4) is a lipid-binding protein, which is primarily synthesized in the small intestine, packaged into chylomicrons, and secreted into intestinal lymph during fat absorption. In the circulation, apoA-IV is present on chylomicron remnants, high-density lipoproteins, and also in lipid-free form. ApoA-IV is involved in a myriad of physiological processes such as lipid absorption and metabolism, anti-atherosclerosis, platelet aggregation and thrombosis, glucose homeostasis and food intake. Besides, Apolipoprotein H (APOH) has been identified as an interactor of APOA4, thus a functional binding ELISA assay was conducted to detect the interaction of recombinant human APOA4 and recombinant bovine APOH. Briefly, APOA4 was diluted serially in PBS with 0.01% BSA (pH 7.4). Duplicate samples of 100 μl were then transferred to APOH-coated microtiter wells and incubated for 1h at 37℃. Wells were washed with PBST and incubated for 1h with anti-APOA4 pAb, then aspirated and washed 3 times. After incubation with HRP labelled secondary antibody for 1h at 37℃, wells were aspirated and washed 5 times. With the addition of substrate solution, wells were incubated 15-25 minutes at 37℃. Finally, add 50 µL stop solution to the wells and read at 450/630 nm immediately. The binding activity of recombinant human APOA4 and recombinant bovine APOH was shown in Figure 1, the EC50 for this effect is 0.16 ug/mL.
Usage
Reconstitute in 10mM PBS (pH7.4) to a concentration of 0.1-1.0 mg/mL. Do not vortex.
Storage
Avoid repeated freeze/thaw cycles. Store at 2-8°C for one month. Aliquot and store at -80°C for 12 months.
Stability
The thermal stability is described by the loss rate. The loss rate was determined by accelerated thermal degradation test, that is, incubate the protein at 37°C for 48h, and no obvious degradation and precipitation were observed. The loss rate is less than 5% within the expiration date under appropriate storage condition.
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Citations
- Hepatic lipase- and endothelial lipase-deficiency in mice promotes macrophage-to-feces RCT and HDL antioxidant propertiesPubMed: 23328279
- Differential plasma proteome analysis in patients with high?altitude pulmonary edema at the acute and recovery phasesPubmed:24940404
- Human maternal plasma proteomic changes with parturitionSciencedirect:S2212968514000506
- Development of concise audit standards for unplanned return to theate following gynaecological surgery at Gloucestershire Royal HospitalDoi: 10.1111
- Systemic Alterations of Immune Response-Related Proteins during Glaucoma Development in the Murine Model DBA/2JPubmed: 32585848
- Pathology and Proteomics-Based Diagnosis of Localized Light-Chain Amyloidosis in Dogs and CatsPubmed: 32880234
- Discovery and validation of FBLN1 and ANT3 as potential biomarkers for early detection of cervical cancer33602229