Watching a gene at work : Nature News: "Scientists have viewed the expression of an individual gene inside a human cell. Knowledge of the real-time dynamics of gene expression may help researchers to explain variation among genetically identical cells and the molecular processes that lead to cancer.
Traditionally, biochemists and cell biologists examined the time-averaged behaviour of thousands or millions of cells in order to understand how the information contained in genes is used to make proteins. Then, in the late 1990s, researchers developed a technique to tag genes so that they produce a fluorescent signal the moment they are transcribed into protein blueprints known as messenger RNA1."
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