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We have previously reported 18S and 25S ribosomal RNA molecules in Candida albicans resistant to processive 5' → 3' exonuclease, appearing as cells approached stationary growth phase. Initial analysis pointed to extra phosphate(s) at their 5'- end raising the possibility that they were newly transcribed. Here we report on additional experiments exploring this possibility and try to establish which of the RNA polymerases may be transcribing them. Oligo-ligation and primer extension again showed the presence of extra phosphate at the 5'-end
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