Human APOE4/Apolipoprotein E Protein

产品信息(Product Info)

Recombinant Human APOE4/Apolipoprotein E Protein is expressed from Expi293 with hFc tag at the N-terminal. It contains Lys19-His317.[Accession | AAB59397.1]

分子量大小(Molecular Weight)

The protein has a predicted MW of 61.6 kDa. Due to glycosylation, the protein migrates to 63-67 kDa based on Tris-Bis PAGE result.


Less than 1EU per μg by the LAL method.


> 95% as determined by Tris-Bis PAGE


Lyophilized from 0.22μm filtered solution in PBS, 2mM DTT, 5mM CHAPS (pH 7.4). Normally 8% trehalose is added as protectant before lyophilization.


Centrifuge tubes before opening. Reconstituting to a concentration more than 100 μg/ml is recommended. Dissolve the lyophilized protein in distilled water.


-20 to -80°C for 12 months as supplied from date of receipt.
-20 to -80°C for 3-6 months in unopened state after reconstitution.
2-8°C for 2-7 days after reconstitution.
Recommend to aliquot the protein into smaller quantities for optimal storage. Please avoid freeze-thaw cycles.

产品数据(Assay Data)
Tris-Bis PAGE

Human APOE4 on Tris-Bis PAGE under reduced condition. The purity is greater than 95%.

SPR Data

Human APOE4, hFc Tag captured on CM5 Chip via Protein A can bind Human LILRB4, His Tag with an affinity constant of 11.87 nM as determined in SPR assay (Biacore T200).


Apolipoprotein E (apoE) is a lipid carrier in both the peripheral and the central nervous systems. Lipid-loaded apoE lipoprotein particles bind to several cell surface receptors to support membrane homeostasis and injury repair in the brain. Considering prevalence and relative risk magnitude, the ε4 allele of the APOE gene is the strongest genetic risk factor for late-onset Alzheimer's disease (AD).


Apolipoprotein E; Apo-E; APOE; apolipo E; APOE4


(1) Zhao N, Liu CC, Qiao W, Bu G. Apolipoprotein E, Receptors, and Modulation of Alzheimer's Disease. Biol Psychiatry. 2018 Feb 15;83(4):347-357. doi: 10.1016/j.biopsych.2017.03.003. Epub 2017 Mar 14. PMID: 28434655; PMCID: PMC5599322.