label: 5-methylcytidine(72) in tRNA(Cys) + S-adenosyl-L-homocysteine + H(+) => cytidine(72) in tRNA(Cys) + S-adenosyl-L-methionine
label_lc: 5-methylcytidine(72) in trna(cys) + s-adenosyl-l-homocysteine + h(+) => cytidine(72) in trna(cys) + s-adenosyl-l-methionine