TRMT112 protein activates various methyltransferases for rRNA, tRNA, and protein modifications. It cooperates with BUD23 to methylate guanine N(7) of 18S rRNA. KMT9a/KMT9b Protein, Human (His) is the recombinant human-derived KMT9a/KMT9b, expressed by E. coli, with His labeled tag.