Eprex, Roche's NeoRecormon and Amgen's Epogen are all versions of the same hormone, erythropoietin, or EPO.

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Instead, it licensed the rights to use a protein called erythropoietin from Thousand Oaks, Calif.

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Among other things, Serum is working on an improved version of erythropoietin, a protein to treat anemia.

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Secreted proteins, which include growth hormone, insulin and EPO (erythropoietin), are used by the body as molecular messengers to pass signals from one part of the body to another.

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The market share for biosimilar versions of anemia therapy erythropoietin is less than 13% in France, while in Germany it is 72%, according to IMS Health, a data firm.

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Argentinean export records seem to show tens of thousands of doses of drugs, including knockoffs of erythropoietin and the cancer drugs Eloxatin and methotrexate, making their way from Argentina into Canada.

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The new test is the latest weapon in WADA's arsenal following the development of tests for the endurance-boosting drug erythropoietin (EPO) and so-called designer steroids such as tetrahydrogestrinone (THG), which have been chemically engineered to deceive the testers.

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Another example occurred between 2001 and 2003, when a biological to treat anemia called Eprex (chemical name, erythropoietin), a supposedly identical version of a sibling called Epogen (which was manufactured in a different facility), caused a 30-fold increase in a severe kind of anemia.

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