Technology has immortality, cures for the worlds devastating diseases, quantum computing and a host of other science fiction notions in its grasp. Current trends in a number of areas indicate that over the next 10 years many of these technologies will come to fruition. "The Next 10 Years" tracks the trends that will transform our everyday lives in almost unimaginable ways.

Wednesday, November 12, 2008

Can evolution be shifted into hyperdrive?

A team of Princeton University scientists has discovered that chains of proteins found in most living organisms act like adaptive machines, possessing the ability to control their own evolution.

The research, which appears to offer evidence of a hidden mechanism guiding the way biological organisms respond to the forces of natural selection, provides a new perspective on evolution, the scientists said.

The researchers -- Raj Chakrabarti, Herschel Rabitz, Stacey Springs and George McLendon -- made the discovery while carrying out experiments on proteins constituting the electron transport chain (ETC), a biochemical network essential for metabolism. A mathematical analysis of the experiments showed that the proteins themselves acted to correct any imbalance imposed on them through artificial mutations and restored the chain to working order.

"The discovery answers an age-old question that has puzzled biologists since the time of Darwin: How can organisms be so exquisitely complex, if evolution is completely random, operating like a 'blind watchmaker'?" said Chakrabarti, an associate research scholar in the Department of Chemistry at Princeton. "Our new theory extends Darwin's model, demonstrating how organisms can subtly direct aspects of their own evolution to create order out of randomness."


http://www.princeton.edu/main/news/archive/S22/60/95O56/index.xml?section=topstories

0 Comments:

Post a Comment

<< Home