a pseudouridine in rRNA + S-adenosyl-L-methionine => an N(1)-methylpseudouridine in rRNA + S-adenosyl-L-homocysteine + H(+)
a pseudouridine in rrna + s-adenosyl-l-methionine => an n(1)-methylpseudouridine in rrna + s-adenosyl-l-homocysteine + h(+)
a pseudouridine in rRNA + S-adenosyl-L-methionine => an N(1)-methylpseudouridine in rRNA + S-adenosyl-L-homocysteine + H(+)
a pseudouridine in rrna + s-adenosyl-l-methionine => an n(1)-methylpseudouridine in rrna + s-adenosyl-l-homocysteine + h(+)