Found: A new form of DNA in our cellsScientists have tracked down an elusive 'tangled knot' of DNA
重大發現:我們細胞中的一種新形式的DNA
科學家已經追踪到一個難以捉摸的“糾結”DNA
Source: Garvan Institute of Medical Research
In a world first, researchers have identified a new DNA structure -- called the i-motif -- inside cells. A twisted 'knot' of DNA, the i-motif has never before been directly seen inside living cells.
It's DNA, but not as we know it.
In a world first, Australian researchers have identified a new DNA structure -- called the i-motif -- inside cells. A twisted 'knot' of DNA, the i-motif has never before been directly seen inside living cells.
The new findings, from the Garvan Institute of Medical Research, are published today in the leading journal Nature Chemistry.
Deep inside the cells in our body lies our DNA. The information in the DNA code -- all 6 billion A, C, G and T letters -- provides precise instructions for how our bodies are built, and how they work.
The iconic 'double helix' shape of DNA has captured the public imagination since 1953, when James Watson and Francis Crick famously uncovered the structure of DNA. However, it's now known that short stretches of DNA can exist in other shapes, in the laboratory at least -- and scientists suspect that these different shapes might play an important role in how and when the DNA code is 'read'.
首先,澳大利亞的研究人員在細胞內發現了一種新的DNA結構 - 稱為i-基元。 一個扭曲的“DNA結”,i-motif以前從未在活細胞內直接看到過。