During template switching, an enzyme from Moloney murine leukemia virus adds a few extra instances of this molecule. Along with amphotericin B (am-foh-TEH-ruh-suhn BEE), an organofluorine analogue of this molecule is the first line treatment for cryptococcus (crip-toh-CAH-kuss) infections. APOBEC (ah-POH-beck) enzymes catalyze the deamination (dee-AM-in-ay-shun) of this molecule, which can also occur when (-5[1])exposed to bisulfite. This molecule is the lighter of the two that together form namesake islands, in (-5[1])which this molecule is frequently methylated. This molecule readily undergoes spontaneous (10[1])deamination (-5[1])to form uracil. When this nucleotide is the (-5[1])second base in a codon, the third base is always interchangeable. This nucleotide forms three hydrogen (-5[1])bonds (10[1]-5[1])with its binding (10[1])partner guanine. For 10 points, name (10[4]0[1])this nucleotide symbolized C. ■END■