1 resultado para Choruses, Sacred (Mixed voices, 3 parts), Unaccompanied.
em National Center for Biotechnology Information - NCBI
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Resumo:
Some mitochondrial tRNA genes of land snails show mismatches in the acceptor stems predicted from their gene sequences. The majority of these mismatches fall in regions where the tRNA genes overlap with adjacent downstream genes. We have synthesized cDNA from four circularized tRNAs and determined the sequences of the 5' and 3' parts of their acceptor stems. Three of the four tRNAs differ from their corresponding genes at a total of 13 positions, which all fall in the 3' part of the acceptor stems as well as the discriminator bases. The editing events detected involve changes from cytidine, thymidine, and guanosine to adenosine residues, which generally restore base-pairing in the stems. However, in one case an A-A mismatch is created from an A-C mismatch. It is suggested that this form of RNA editing may involve polyadenylylation of the maturing tRNAs as an intermediate.