label: 2'-O-methyluridine(2552) in 23S rRNA + S-adenosyl-L-homocysteine + H(+) => uridine(2552) in 23S rRNA + S-adenosyl-L-methionine
label_lc: 2'-o-methyluridine(2552) in 23s rrna + s-adenosyl-l-homocysteine + h(+) => uridine(2552) in 23s rrna + s-adenosyl-l-methionine