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Ri Rn

ribonucleic acid

PR: /ˌraɪ.bəʊ.njuː.kliː.ɪk ˈæs.ɪd/ IT: acido ribonucleico DEF: an important chemical present in all living cells. (Definition of adenine from the Cambridge Academic Content Dictionary © Cambridge University Press) Copyright: GNU Free Documentation License. (GFDL)