Recombinant HBV Surface Antigen-preS1
SKU: 16259178916

Recombinant HBV Surface Antigen-preS1

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Description

Recombinant HBV Surface Antigen-preS1Product Specification Species HBV Accession P31869 Amino Acid Sequence Met1 Ala119 MGGWSSKPRQGMGTNLSVPNPLGFFPDHQLDPAFGANSNNPDWDFNPNKDHWPEAHQVGAGAFGPGFTPPHGGLLGWSPQAQGILTTVPVAPPPASTNRQSGRQPTPISPPLRDSHPQA Expression System E. coli Molecular Weight 14 kDa(Reducing) Purity 95% by SDS PAGE Endotoxin <2EU g Conjugation Unconjugated Physical Appearance Lyophilized Powder Reconstitution Reconstitute at 0. 1 1 mg ml according to the size in ultrapure water

Product Specification


Species HBV
Accession P31869
Amino Acid Sequence Met1-Ala119 MGGWSSKPRQGMGTNLSVPNPLGFFPDHQLDPAFGANSNNPDWDFNPNKDHWPEAHQVGAGAFGPGFTPPHGGLLGWSPQAQGILTTVPVAPPPASTNRQSGRQPTPISPPLRDSHPQA
Expression System E.coli
Molecular Weight 14 kDa(Reducing)
Purity

>95% by SDS-PAGE

Endotoxin <2EU/μg
Conjugation Unconjugated
Physical Appearance Lyophilized Powder
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, -20 to -70 °C as supplied. 
· 6 months, -20 to -70 °C under sterile conditions after reconstitution.
· 1 week, 2 to 8 °C under sterile conditions after reconstitution.  
· Please avoid repeated freeze-thaw cycles.

Background

Hepatitis B virus (HBV) is a human pathogen, causing serious liver disease. The HBV surface protein antigens (HBsAg) are comprised of three carboxyl co terminal HBs proteins termed large (LHBs), middle (MHBs) and small (SHBs, also called major) protein. LHBs and MHBs also share the highly hydrophobic, repetitive, membrane spanning S domain. In addition, LHBs has a 119 amino acid region called preS1. The E.Coli derived Recombinant Hepatitis B Surface Antigen preS1 is a single non-glycosylated polypeptide chain.

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SKU: 16259178916

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Verified Purchase
Nichole
Louisville, US
★★★★★ 5
Helpful study guide
Format: Paperback
Helped me pass the CAPM. Broke material into domains and practice questions after each domain helps to apply the material to scenarios
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 11, 2026
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Verified Purchase
Amazon Customer
Cuba, US
★★★★★ 5
CAPM PASSED
Format: Paperback
Used this as main study tool passed on first try ! Studied from Dec 2nd -25 took test on Dec 26
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Reviewed in the United States on December 27, 2025
D
Verified Purchase
Danielle
Los Angeles, US
★★★★★ 3
Typos and confusing/missing information
Format: Paperback, Format: Paperback
I finished Domain 1 and it's okay. Things are explained well, but there are a lot of typos and strange formatting. The cover of the book says 2025-2026, but the spine of the book says 2024-2025. The way that the quiz questions are worded is confusing and sometimes repetitive. I had 2 of the same questions in a row in one section. I'm struggling to take some quizzes because the questions that are being asked do not reference any material from that section (or anywhere in the book so far). I feel like there is information missing in the sections because the quizzes have random terms that have never been mentioned. Example: D1: Essential knowledge questions I am being asked about estimation tools like story points, relative estimation, and planning poker. Nowhere in the book have those things been mentioned.
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Reviewed in the United States on July 23, 2025
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Lisa Costa
Dallas, US
★★★★★ 5
You got this! Focus on your education
Format: Paperback
Excellent !
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Reviewed in the United States on January 25, 2026
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Tia Thompson
Cuba, US
★★★★★ 5
I passed!!! —Highly Recommend
Format: Paperback
Great study guide and structure tailored to the 4 domains that are in the CAPM Exam. I just passed the exam on my first try scoring above target in 3/4 categories and target in 1/4 categories. The online simulations was a great way to prepare for the exam. Highly recommend you purchase to pass the first try! (This and the PMBOK Guide 7th edition were the only study materials I used)
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Reviewed in the United States on May 20, 2025

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