Phân tích tư tưởng của nhân dân qua đoạn thơ: Những người vợ nhớ chồng… Những cuộc đời đã hóa sông núi ta trong Đất nước của Nguyễn Khoa Điềm
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The NMR structure of 2¢,5¢ d(GGGGCCCC) was deter-mined togain insights into the structural differences between2¢,5¢-and 3¢,5¢-linked DNA duplexes that may be relevantin elucidating nature’s choice of sugar-phosphate links toencode genetic information. The oligomer assumes a duplexwith extended nucleotide repeats formed out of mostlyN-type sugar puckers. With the exception of the 5¢-terminalguanine that assumes thesyn glycosyl conformation, allother bases prefer theantiglycosyl conformation. Base pairsin the duplex exhibit slide ()1.96 A˚) and intermediate valuesfor X-displacement ()3.23 A˚), as in ADNA, while theirinclination to the helical axis is not prominent. ...
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Báo cáo khoa học: Solution structure of 2¢,5¢ d(G4C4) Relevance to topological restrictions and nature’s choice of phosphodiester links
