All Photos(2)




Antithrombin III human

recombinant,carrier-free,expressed in HEK 293 cells

Sign Into View Organizational & Contract Pricing

AT-III, AT3, AT3D, ATIII, ATIII-R2, Factor Xa inhibitor, Heparin cofactor, SERPINC1, Serpin family C member1, Serpin-C1, THPH7


expressed in HEK 293 cells


≥95% (SDS-PAGE)


lyophilized powder


IC50 ≤ 5 nM antithrombin III

specific activity

IC50 ≤ 5 nM antithrombin III, (Measured by the ability of antithrombin III to inhibit the activity of thrombin in the presence of heparin. )


≤1.0 EU/μg (LAL test)

UniProt accession no.

shipped in


storage temp.


Related Categories

General description

Recombinant human antithrombin III (AT-III) is expressed in human HEK 293 cells as a glycoprotein with a calculated molecular mass of 49 kDa (amino acids 33-464). This protein is manufactured in human cells, with no serum. The human cells expression system allows human-like glycosylation and folding, and often supports higher specific activity of the protein. The protein is produced with no artificial tags.


This recombinant human AT-III product can be used to study the mode of action of the enzyme, as well as its potential inhibitors. It may also be used as a standard, e.g. in antithrombin activity assay, and/or in in vivo studies.

Biochem/physiol Actions

Antithrombin III (AT-III), or Serpin C1 is a serine protease inhibitor glycoprotein, is a member of the Serpin superfamily. Antithrombin III inactivates several components in the coagulation system, IIa,IXa and mainly thrombin and factor Xa. The inhibitory activity of Antithrombin III is potentiated and increased by the polysaccharide heparin. In addition to its abolishment of coagulation, Antithrombin III was also found to suppress proinflammatory mediators, in part by its anticoagulation action. Congenital antithrombin deficiency results in loss of Antithrombin III activity, and leads to thrombosis. Thus, human Antithrombin III enzyme may be prescribed for the treatment and prevention of thromboembolism, as well as for the prevention of perioperative and peripartum thromboembolism.


RESEARCH USE ONLY. This product is regulated in France when intended to be used for scientific purposes, including for import and export activities (Article L 1211-1 paragraph 2 of the Public Health Code). The purchaser (i.e. enduser) is required to obtain an import authorization from the France Ministry of Research referred in the Article L1245-5-1 II. of Public Health Code. By ordering this product, you are confirming that you have obtained the proper import authorization.

Storage Class

13 - Non Combustible Solids




Not applicable


Not applicable

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

Already Own This Product?

Documents related to the products that you have purchased in the past have been gathered in the Document Library for your convenience.

Visit the Document Library

Difficulty Finding Your Product Or Lot/Batch Number?

Product numbers are combined with Pack Sizes/Quantity when displayed on the website (example: T1503-25G). Please make sure you enter ONLY the product number in the Product Number field (example: T1503).


Product Number
Pack Size/Quantity

Additional examples:





enter as 1.000309185)

Having trouble? Feel free to contact Technical Service for assistance.

Lot and Batch Numbers can be found on a product's label following the words 'Lot' or 'Batch'.

Aldrich Products

  • For a lot number such as TO09019TO, enter it as 09019TO (without the first two letters 'TO').

  • For a lot number with a filling-code such as 05427ES-021, enter it as 05427ES (without the filling-code '-021').

  • For a lot number with a filling-code such as STBB0728K9, enter it as STBB0728 without the filling-code 'K9'.

Not Finding What You Are Looking For?

In some cases, a COA may not be available online. If your search was unable to find the COA you can request one.

Request COA

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service