Abstract

Direct incorporation of azide groups into RNA oligonucleotides by in vitro transcription reactions in the presence of a new azide-modified UTP analogue, and subsequent posttranscriptional chemical labeling of azide-modified oligoribonucleotide transcripts by click and Staudinger reactions are described. This postsynthetic labeling protocol is robust and modular, and offers an alternative access to RNA labeled with biophysical probes.

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