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Prooligonucleotides with alternating S-Acyl-ThioEthyl (SATE) phosphotr
iester and phosphodiester linkages or a gap were synthesized by elimin
ation of cyanoethyl group with non-nucleophilic base DBU. Their half-l
ives in the presence of pig Liver Esterases (PLE) and in total cell ex
tract were determined. (C) 1998 Elsevier Science Ltd. All rights reser
ved.