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Figure 1. Pathways and enzymes of adenosine metabolism.
ITU: iodotubericidine, a blocker of adenosine kinase. EHNA: erythro-9-(2-hydroxy-3-nonyl-)-adenine, a blocker of adenosine deaminase. NBTI: n-nitrobenzylthioinosine, a blocker of adenosine membrane transport.