limit! IsoGNA (a structural isomer of GNA) was found—in sharp contrast to GNA—to be highly restricted in its ability to base‐pair with itself and other nucleic acids. While homogeneous sequences (e.g. isoGNA(A)16) formed duplexes, the heterogeneous sequences showed no base‐pairing. This exemplifies the limitations of canonical nucleobases as the recognition elements in simpler, more primitive phosphate
知道你的极限!与GNA形成鲜明对比的是,发现IsoGNA(GNA的结构异构体)在与自身和其他核酸碱基配对的能力上受到严格限制。虽然同质序列(例如isoGNA(A)16)形成双链体,但异质序列未显示碱基配对。这举例说明了在更简单,更原始的
磷酸盐骨架中作为识别元件的规范核碱基的局限性。