SKU: 85986354747

CD81 Fc Chimera Protein, Human

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Description

CD81 Fc Chimera Protein, HumanProduct Specification Species Human Synonyms CVID6, S5. 7, TAPA1, TSPAN28CD81 antigen CD81 Accession P60033 Amino Acid Sequence Phe113 Lys201, with hIgG Fc Expression System HEK293 Molecular Weight 35 42kDa (Reducing) Purity 95% by SDS PAGE & SEC HPLC Endotoxin <0. 1EU g Conjugation Unconjugated Physical Appearance Lyophilized Powder Storage Buffer PBS, PH7. 4, 5% trehalose Reconstitution Reconstitute at 0. 1 1 mg ml according to the size in ultrapure

Product Specification


Species Human
Synonyms CVID6, S5.7, TAPA1, TSPAN28,CD81 antigen, CD81
Accession P60033
Amino Acid Sequence Phe113-Lys201, with hIgG Fc
Expression System HEK293
Molecular Weight

35-42kDa (Reducing)

Purity >95% by SDS-PAGE & SEC-HPLC
Endotoxin <0.1EU/μg
Conjugation Unconjugated
Physical Appearance Lyophilized Powder
Storage Buffer PBS, PH7.4, 5% trehalose
Reconstitution

Reconstitute at 0.1-1 mg/ml according to the size in ultrapure water after rapid centrifugation.

Stability & Storage · 12 months from date of receipt, lyophilized powder stored at -20 to -80℃.
· 3 months, -20 to -80℃ under sterile conditions after reconstitution.
· 1 week, 2 to 8℃ under sterile conditions after reconstitution.
· Please avoid repeated freeze-thaw cycles.
Reference

1.  Biochem Soc Trans 2017 Apr 15;45(2):531-535 

Background

CD81 participates in a variety of important cellular processes such as membrane organization, protein trafficking, cellular fusion and cell-cell interactions. In the immune system, CD81 regulates immune synapse, receptor clustering and signaling; it also mediates adaptive and innate immune suppression. CD81 is a gateway in hepatocytes for pathogens such as hepatitis C virus and Plasmodium. These diverse biological roles are due to the tendency of CD81 to associate with other tetraspanins and with cell-specific partner proteins, which provide the cells with a signaling platform. CD81 has also been shown to regulate cell migration and invasion, and has therefore been implicated in cancer progression. Indeed, we have recently shown that CD81 contributes to tumor growth and metastasis. CD81 is expressed in most types of cancer, including breast, lung, prostate, melanoma, brain cancer and lymphoma, and the overexpression or down-regulation of this molecule has been correlated with either good or bad prognosis.

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SKU: 85986354747

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Richard Gopen
Chelsea, US
★★★★★ 5
Good, inexpensive replacement filter
I've used these filters for a couple years (four replacements) on my Subaru Crosstrek, and they seem to do the job well, probably as well as the original. I generally remove and clean them every three months, and replace them every six.
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Reviewed in the United States on May 7, 2026
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Jim Wallace
Louisville, US
★★★★★ 5
Save some money by doing your own cabin filter change! (You won't notice a difference).
So, one day I was getting an oil change at the dealership, and the associate told me that cabin filter was pretty dirty, which I believed because of the places I take the car, and she said that they could change it while they were finishing up the rest of their inspection, since they already had it apart. I asked her "How much?", and then we both had a laugh when she said "$90." I told her I'd take care of it. It took two days for Amazon to get a replacement filter to me, twenty minutes to watch a You Tube video showing how to replace the cabin filter on my car (I watched it twice), and then about twenty-five minutes to replace the filter itself--I keep a messy glove compartment, so a good portion of the time was loading and unloading that nightmare. In the end, under $15 for the filter, maybe 45 minutes to watch and replace, and the cabin filter hasn't been this good since I first bought the car. This replacement version was as good as the OE filter, fit exactly the same, there's no difference in airflow that I can tell, and so far (6 months later), it seems to be holding up pretty well. We'll see what it is like after a year. I did get the oil changed about a week ago, and the technician didn't raise any alarms about the filter, so everything seems to be working. $90 for a new filter? You can do it yourself cheaper.
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Reviewed in the United States on April 6, 2026
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chad martin
Natrona Heights, US
★★★★★ 4
Fresh Air Upgrade for My 2024 Impreza
Installed this in my 2024 Subaru Impreza, and it fit perfectly—no issues. The air smells noticeably cleaner now, and it took less than 10 minutes to swap out. The carbon and HEPA filtration does a great job clearing out odors, dust, and pollen—definitely an upgrade over the factory filter. The build feels sturdier than the OEM version, though it does have slightly fewer pleats. Might mean it needs replacing a bit sooner, but for the price and performance, I’m fine with that tradeoff. If you’re looking for a quick, affordable way to improve your cabin air, this one’s a solid pick. 
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Reviewed in the United States on June 26, 2025
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Gram21
Phoenix, US
★★★★★ 5
Well built, good fit.
I like it so well, I just bought two more to keep on the shelf for when the price doubles. Seems better built than oem, but I don't know how you can judge the filtration; seems good though.
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Reviewed in the United States on May 6, 2026
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LJ
Boise, US
★★★★★ 5
Great product
Perfect fit for 21 Cross Trek
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Reviewed in the United States on February 12, 2026

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