Veter753 писал(а):
это не перевод. Это статья Маркова на элементах.
Я ж написал "на общедоступный". Это статья из научпоп источника, которая переводит для простого люда смысл статьи Сазерленда. Но это мелочи.
Цитата:
Сазерленд действительно открыл способ получить один из нуклеотидов абиогенным способом.
А в статье пишут, что оба обнаружены. И оба имеют устойчивость к УФ.
Цитата:
Limited irradiation of aqueous solutions of cytosine nucleosides with ultraviolet light having an emission maximum at 254 nm results in the reversible formation of photohydrates and partial hydrolysis to the corresponding uracil nucleosides. Prolonged irradiation causes additional chemistry to take place, and results in the destruction of most pyrimidine nucleosides and nucleotides (for example 26, 30 and the major nucleoside/nucleotide products deriving from ribose amino-oxazoline 21; see Supplementary Information). By contrast, however, we found that prolonged irradiation of beta-ribocytidine-2',3'-cyclic phosphate 1 causes significant hydrolysis to beta-ribouridine-2',3'-cyclic phosphate 33, with very little destructive photochemistry other than slight nucleobase loss; cytosine 3 and uracil 34 were both detected (Fig. 5). This finding suggests that there must be some protective mechanism functioning with 1 and 33 that does not operate with other pyrimidine nucleosides and nucleotides. Whatever the mechanism (Supplementary Information), the protection against the destructive effects of irradiation provides a means whereby 1 and 33, the two activated pyrimidine ribonucleotides needed for RNA synthesis, can be enriched relative to other end products of the assembly process we have discovered.
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