label: uridine(2634) in 25S rRNA + S-adenosyl-L-methionine => N(3)-methyluridine(2634) in 25S rRNA + S-adenosyl-L-homocysteine + H(+)
label_lc: uridine(2634) in 25s rrna + s-adenosyl-l-methionine => n(3)-methyluridine(2634) in 25s rrna + s-adenosyl-l-homocysteine + h(+)