. "The enzyme converts uridines at position 955, 2504 and 2580 of 23S rRNA to pseudouridines." . . . "23S rRNA pseudouridine(955/2504/2580) synthase" . "23S rRNA uridine(955)/uridine(2504)/uridine(2580) = 23S rRNA pseudouridine(955)/pseudouridine(2504)/pseudouridine(2580)." .