?:definition
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Catalysis of the reaction: 2 S-adenosyl-L-methionine + adenine(2503) in 23S rRNA = S-adenosyl-L-homocysteine + 5\'-deoxyadenosine + L-methionine + rRNA containing C2-methyladenine(2503) in 23S rRNA. [GOC:imk, PMID:20007606, PMID:20184321, PMID:21368151, PMID:21415317, PMID:21527678]
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