一、前言 1979年12月9日,美国麻省诸塞工科大学(MIT)生物学教室Rich教授及其同事们,在自然杂志上详细的发表了关于发现“Z—DNA”即“左旋DNA”的内容。本文除忠实而简明的介绍这篇在生物学上具有重要意义的惊人的新发现外,并增添了一些个人的见解进行了探讨。二、Watson—Crich—Wilkin s的右旋B—DNA 1953年Watson和Crich提出的著名的DNA右旋双螺旋结构模型,是由英国结晶学家Franklin,Langridger和Wilkins等根据X射线纤维衍射的解释,证明了其模型的正确性,这可说是为分子生物学或分子遗传学奠定了基础,被认为是二十世纪的最大 I. Introduction On December 9, 1979, Professor Rich Richmond and his colleagues at MIT’s Biology Class in Massachusetts Massachusetts published in detail in Nature Magazine about the discovery of “Z-DNA” or “left-handed DNA” Content. In addition to his devout and concise introduction of this surprisingly new, biologically significant discovery, this article explores some of the personal insights. Second, Watson-Crich-Wilkin’s dextrorotatory B-DNA The well-known DNA dextrorotatory double helix model proposed by Watson and Crich in 1953 was interpreted by the British crystallographers Franklin, Langridger and Wilkins et al. According to X-ray fiber diffraction , Proved the correctness of its model, which can be said to lay the foundation for molecular biology or molecular genetics, is considered to be the largest in the twentieth century