Amgen developed Epogen first and litterally made billions-of-dollars off its sales thus setting Amgen up as the biotech giant it is today. After 17-years, the Epogen patent expired allowing other drug manufacturers to "monkey" with it and make revised versions of it. That's where Roche comes in.
Roche adds a "...gylcol molecule" to the EPO making it more powerful and subsequently requiring patients to receive less doses of it. Patients like the idea of receiving fewer shots and cheaters, who are obviously more inspired by a more powerful form of EPO, began taking it. However, there is this little detail the dopers missed and I suspect that little detail is the "Methoxy polyethylene glycol" molecule they added to it. (Who has that molecule bouncing around their system like a carbonated bubble inside a bottle Perrier? Not me!)
Roche knows what they created and they know the consequences, so they hook up with WADA and I have a strong suspicion that they said, test for "Methoxy polyethylene glycol." My reference for believing that is the test marker is this NPR article that references it: [Link]
The Guardian: "...On Wednesday the International Olympic Committee said the new Cera blood test would be used to analyse almost 1,000 blood samples collected during the Beijing Games, and an IOC spokeswoman added last night that these samples could also be tested for autologous transfusions "if a method is fully validated by the scientific community [and] Wada.". ..." [Link]
The Associated Press: "...The head of the Tour de France on Tuesday hailed a new lab test that has exposed three riders in the 2008 race for cheating with an advanced form of the blood booster EPO.
"It's very good. It allows us to confound the cheaters," Christian Prudhomme told The Associated Press by phone. "What's being done at the Tour de France has never existed in the world of sport, in no competition."..." [Link]
However, The Giro d'Italia Chief won't retest riders for CERA because he "knows that all his riders were all clean." (I can just see our American NFL Commissioner saying to himself, "yeah, that has a nice ring to it as a drug protocol - Gosh, I soooo stupid not to have thought that up myself!")
Vello News: '...According to Gazzetta dello Sport on Friday, Zomegnan believes none of the riders on the race - won by Spaniard Alberto Contador - used the drug. ..." Vello News: [Link]
Thanks to the French Coach for suggesting this article.