of base pair in an oligodeoxynucleotide (ODN) duplex, they were incorporated into ODNs, and the Tm value of the ODN duplex was determined. However, the ODN duplex containing a DC3Pu:FPy pair has a lower thermal stability than that containing a G:C pair does, although its thermal stability is equal to that of an ODN duplex with an A:T pair even under acidic conditions.
摘要 分别制备了能够在 DDD 和 AAA H 键模式中相互作用的
呋喃嘧啶 (FPy) 和 2,6-二
氨基-3-脱氮
嘌呤 (DC 3 Pu) 核苷。DC 3 Pu 核苷的 N-1 p K a值估计为 6.4,这是由于在 3 位缺少氮原子,表明 DC 3 Pu 作为碱基在 DDD H 中相互作用-在接近生理条件下的键合模式。由于 DC 3 Pu 和 FPy 预计会在寡脱氧核苷酸 (ODN) 双链体中形成热稳定的 DDD:AAA 型碱基对,因此将它们掺入 ODN,并确定 ODN 双链体的T m值。然而,ODN 双工包含一个 DC3 Pu:FPy 对的热稳定性低于包含 G:C 对的热稳定性,尽管即使在酸性条件下,其热稳定性也与具有 A:T 对的 ODN 双链体相同。