Alkynyl-derivatized cap analogs, alkynyl-modified capped RNA, 1,4-disubstituted triazole-derivatized capped RNA, methods of preparation, methods of isolation, and uses thereof are provided. The “click” modification facilitates detection and isolation of capped RNAs and the 1,4-disubstituted triazole derivatives formed by the “click” reaction are useful for producing RNA transcripts and encoded protein.