WW.JHAND3 2 4. Recombinent human erythropoietin (Epo) was devel- oped for for medical use. For example, it can be ben- eficial to people who have kidney damage and do not produce enough erythropoietin on their own. However, Epo is also used by some athletes as an illicit drug that boosts performance. Explain why Epo can enhance per- formance in some athletic events.

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