981 resultados para Intertextuality in the translation


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Several studies have indicated that degradation of certain mRNAs is tightly coupled to their translation, whereas, in contrast, other observations suggested that translation can be inhibited without changing the stability of the mRNA. We have addressed this question with the use of altered CYC1 alleles, which encode iso-1-cytochrome c in the yeast Saccharomyces cerevisiae. The cyc1-1249 mRNA, which lacks all in-frame and out-of-frame AUG triplets, was as stable as the normal mRNA. This finding established that translation is not required for the degradation of CYC1 mRNAs. Furthermore, poly(G)18 tracks were introduced within the CYC1 mRNA translated regions to block exonuclease degradation. The recovery of 3' fragments revealed that the translatable and the AUG-deficient mRNAs are both degraded 5'-->3'. Also, the increased stability of CYC1 mRNAs in xrn1-delta strains lacking Xrn1p, the major 5'-->3' exonuclease, established that the normal and AUG-deficient mRNAs are degraded by the same pathway. In addition, deadenylylation, which activates the action of Xrn1p, occurred at equivalent rates in both normal and AUG-deficient mRNAs. We conclude that translation is not required for the normal degradation of CYC1 mRNAs, and that translatable and untranslated mRNAs are degraded by the same pathway.

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This article is the English version of “Traductoras gallegas del siglo XX: Reescribiendo la historia de la traducción desde el género y la nación” by Olga Castro. It was not published on the print version of MonTI for reasons of space. The online version of MonTI does not suffer from these limitations, and this is our way of promoting plurilingualism.

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English and persion on opposite pages, each text having its own paging (p. 9-170)

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Signatures: [A²], B-D⁴, E².

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At head of title: Second Boston edition.