In plants, a form of this molecule can be cleaved by proteins from the DEMETER family. Combining this molecule with arabinose generates an anti·metabolite often used to treat acute myeloid leukemia. In a technique (-5[1])developed by Chuan He’s lab, the oxidation of a derivative (-5[1])of this molecule by TET proteins (-5[1])converts it into a 5-carboxyl form reactive to bisulfite. Enzymes (15[1]-5[1])from the AID/APOBEC family facilitate the (*) deamination (10[1])of this (10[1]-5[1])molecule. (10[3]-5[2])This molecule, which is subjected to methylation (-5[1])by DNMTs (10[2]-5[1])during (10[1])epigenetic (10[1]-5[1])control, (-5[2])is the lighter (-5[3])of the two (-5[1])nucleobases (-5[1])found at “island” sequences (10[1])that it co-names. (-5[1])This pyrimidine can appear in both (10[1]-5[1])DNA and RNA, (-5[1])unlike (10[1])thymine and uracil. (10[1]0[1]-5[1])For (10[1])10 points, name this nucleobase that pairs with guanine. (10[3])■END■ (10[17]0[7])