Scientists Build Artificial Chromosome

In what is being called a major step forward in genetic engineering, scientists have built a customized copy of an entire yeast chromosome.  Experts say it may lead to a better understanding of how the thousands of genes contained in these packages of genetic material work together in everything from yeast to humans.  And it may make it easier to make designer yeast, creating living factories that churn out everything from antibiotics to biofuels.   Johns Hopkins University...

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