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Mostrando 13-16 de 16 artigos, teses e dissertações.
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13. New Guinea highland origin of a widespread arthropod supertramp
The biologically and geologically extremely diverse archipelagos of Wallacea, Australasia and Oceania have long stimulated ecologists and evolutionary biologists. Yet, few molecular phylogenetic analyses of the terrestrial fauna have been carried out to understand the evolutionary patterns. We use dense taxon and character sampling of more than 7000 bp DNA
The Royal Society.
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14. DNA sequences from multiple amplifications reveal artifacts induced by cytosine deamination in ancient DNA
We show that DNA molecules amplified by PCR from DNA extracted from animal bones and teeth that vary in age between 25 000 and over 50 000 years carry C→T and G→A substitutions. These substitutions can reach high proportions among the molecules amplified and are due to the occurrence of modified deoxycytidine residues in the template DNA. If the template
Oxford University Press.
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15. The sequence context of the initiation codon in the encephalomyocarditis virus leader modulates efficiency of internal translation initiation.
Translation initiation on poliovirus and encephalomyocarditis virus (EMCV) mRNAs occurs by a cap-independent mechanism utilizing an internal ribosomal entry site (IRES). However, no unifying mechanism for AUG initiation site selection has been proposed. Analysis of initiation of mRNAs translated in vitro has suggested that initiation of poliovirus mRNA trans
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16. Relationship between structure and convulsant properties of some beta-lactam antibiotics following intracerebroventricular microinjection in rats.
The epileptogenic activities of several beta-lactam antibiotics were compared following their intracerebroventricular administration in rats. Different convulsant potencies were observed among the various beta-lactam antibiotics tested, but the epileptogenic patterns were similar. The patterns consisted of an initial phase characterized by wet-dog shakes fol