label: 5-methylcytidine(2870) in 25S rRNA + S-adenosyl-L-homocysteine + H(+) => cytidine(2870) in 25S rRNA + S-adenosyl-L-methionine
label_lc: 5-methylcytidine(2870) in 25s rrna + s-adenosyl-l-homocysteine + h(+) => cytidine(2870) in 25s rrna + s-adenosyl-l-methionine