Abstract
We have developed soluble extracts from Neurospora crassa capable of accurately and efficiently transcribing homologous 5S rRNA and tRNA genes. The extracts also appear to quantitatively end-process and splice the primary tRNA transcripts. Although the extracts could not transcribe a heterologous (yeast) 5S rRNA gene, they did transcribe a yeast tRNALeu gene and slowly process the transcripts. In addition, we have developed a novel strategy for rapidly sequencing uniformly labelled RNAs using base-specific ribonucleases. We have used this procedure to verify the identity of the in vitro transcripts and processing products.
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