An octanucleotide dACCCGGGT and decanucleotide dCGACCCGGGT have been synthesized by an improved phosphotriester method. The octanucleotide has a selfcomplementary sequence and the decanucleotide has two protruding nucleotides when it forms a duplex. Thermal properties and circular dichroism spectra of these oligonucleotides have been investigated under various conditions to find differences in the stabilities of these oligonucleotides. A possible concatemer structure of the decanucleotide duplex is suggested on the basis of its circular dichroism spectra in concentrated solution.
通过改进的
磷三酯方法合成了八聚核苷酸 dACCCGGGT 和十聚核苷酸 dCGACCCGGGT。八聚核苷酸具有自我互补的序列,而十聚核苷酸在形成双链时有两个突出核苷酸。对这些寡核苷酸的热学性质和圆二色谱进行了研究,以寻找这些寡核苷酸稳定性之间的差异。基于其在浓缩溶液中的圆二色谱,提出了十聚核苷酸双链的一个可能的聚合体结构。