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Synthesis and Hybridization Studies of Oligoribonucleotides Corresponding to the Common, Double-Stranded Region of the Dihydrouridine Arm of Several Transfer RNA MoleculesEngland, Thomas Edward 10 1900 (has links)
<p> An improved method for the synthesis of oligoribonucleotides of defined sequence was developed. The general phosphotriester synthesis of Neilson and co-workers was modified by the introduction of a new condensing agent, mesitylenesulfonyl-1,2,4-triazole, and by the replacement of the bis(cyclohexylammonium) salt of mono-2,2,2-trichloroethyl phosphate with its acid salt. These modifications provided significant increases in the yields for the condensation of protected nucleosides - especially in the case of purine residues. Finally, modification of the three-step procedure for the deprotection of protected oligoribonucleotides resulted in the isolation of oligomers of exceptional purity and biological activity.</p> <p> Oligomers corresponding to natural sequences in transfer RNA molecules were obtained by this improved method of synthesis. These oligomers were then used to study:
1. The formation of short double-stranded RNA helices and
2. The interactions of aminoacyl-tRNA ligases with tRNA fragments.</p> / Thesis / Doctor of Philosophy (PhD)
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