Source:http://linkedlifedata.com/resource/umls/id/C2754366
GO: Catalysis of two successive methyl transfer reactions from AdoMet to the N-2 atom of guanosine, thereby converting 7-methylguanosine in an RNA cap to 2,2,7 trimethylguanosine. [GOC:BHF, PMID:11983179, PMID:18775984]