The case for an RNA enzyme.
Nilsen
T W
TW
D002384:Catalysis; D004952:Esters; D008345:Manganese / Q000378:metabolism; D012313:RNA / Q000378:metabolism*; D012326:RNA Splicing; D012342:RNA, Small Nuclear / Q000378:metabolism*; D017381:Spliceosomes / Q000378:metabolism*
D004952:Esters; D012342:RNA, Small Nuclear; C405486:U6 small nuclear RNA; D008345:Manganese; D012313:RNA