A molecular illustration of the crowded interior and cell envelope of Escherichia coli. (David S. Goodsell, The Scripps Research Institute) To replicate information, life usually has fairly ...

In a way, sequencing DNA is very simple: There's a molecule, you look at it, and you write down what you find. You'd think it would be easy—and, for any one letter in the sequence, it is. The problem ...

Definition: DNA amplification is the laboratory process of making many copies of a selected DNA sequence from a very small starting amount. It allows DNA that would otherwise be too scarce to detect ...