Assertion: prostaglandin | /r/HasProperty | i.sub.2
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Source sentences:
text: Nitric oxide (NO), prostaglandin (PG) [I.sub.2], that is, prostacyclin ([PGI.sub.2]), and thromboxane [A.sub.2] (Tx[A.sub.2]) are important short-lived signaling molecules involved in many physiological and pathological processes.