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Abstract
Homo-Thy hetero-oligomer probes composed of trans-4-hydroxy-L-proline based PNA-like (HypNA) monomers and phosphono PNA (pPNA) monom-ers demonstrated strong binding to complementary poly A+ RNA strands. We used a mixture of chimeric oligomers containing both “linear” and “clamping” PNA-analogues to develop an mRNA isolation procedure and demonstrate the improved recovery of RNA molecules with secondary structure at the 3′end as well as RNAs with short poly A tails.