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As European countries engage in diplomatic battle over the banned exports of British beef and its products, lessons can be drawn from the sorry history of the British government's selective responses to expert advice.
Existing approaches to sequencing the human genome are based on the assumption that each region to be sequenced must first be mapped. But there is a simpler strategy in which any number of laboratories can cooperate.
In the embryo, cells have to be aware of where they are so that they can differentiate into the right tissue. In part, long-range signalling is involved, but it is not yet clear how diffusible morphogens specify cell type.
The use of a thermally activated DNA polymerase PCR gives improved specificity, sensitivity and product yield without additives or extra process steps.
Product review has the goods and wares for studying the molecular mechanisms of the cell — items include an automated membrane developing system, a mutation detection system and high-efficiency cloning kits.
