Merck, 11175025910, DIG RNA Labeling Kit (SP6/T7)

Assay Time: 145minutes Sample Materials •Linearized plasmid DNA •PCR product Principle The DIG RNA Labeling Kit produces DIG-labeled, single-stranded RNA probes of known length. Either SP6 or T7 RNA polymerase transcribes these probes in vitro from template DNA (in the presence of digoxigenin-UTP). RNA Labeling by in vitro Transcription The DNA to be transcribed is cloned into the polylinker site of appropriate transcription vectors (e.g., pSPT 18 or 19), which contain promoters for SP6 and T7 RNA polymerases. Adjacent template DNA is linearized at a suitable site and the RNA polymerases are used to produce \run off\ transcripts. DIG-UTP is incorporated into the transcript. Every 20 to 25th nucleotide of the newly synthesized RNA is a DIG-UTP. Since the nucleotide concentration does not become limiting in the standard transcription reaction, this reaction can generate large amounts of labeled RNA.