Assertion: cytosine | /r/CapableOf | occur through a series of reactions
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text: The term “demethylation,” as applied to neurons, ordinarily refers to the replacement of 5-methylcytosine (5mC) by cytosine in DNA that can occur through a series of reactions involving a TET enzyme as well as enzymes of the DNA base excision repair pathway (see Epigenetics in learning and memory).