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