uridine in 28S rRNA + S-adenosyl-L-methionine => N(3)-methyluridine in 28S rRNA + S-adenosyl-L-homocysteine + H(+)
uridine in 28s rrna + s-adenosyl-l-methionine => n(3)-methyluridine in 28s rrna + s-adenosyl-l-homocysteine + h(+)
uridine in 28S rRNA + S-adenosyl-L-methionine => N(3)-methyluridine in 28S rRNA + S-adenosyl-L-homocysteine + H(+)
uridine in 28s rrna + s-adenosyl-l-methionine => n(3)-methyluridine in 28s rrna + s-adenosyl-l-homocysteine + h(+)