label: 5-methylcytidine(48) in tRNA precursor + S-adenosyl-L-homocysteine + H(+) => cytidine(48) in tRNA precursor + S-adenosyl-L-methionine
label_lc: 5-methylcytidine(48) in trna precursor + s-adenosyl-l-homocysteine + h(+) => cytidine(48) in trna precursor + s-adenosyl-l-methionine