Word: molecular
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Geha said that next year he will study molecular immunology. He described this field as a new technology which he needed to learn, and said he wished to do so "away from the hassle of everyday life...
Last week Egeland, who is from the University of Miami School of Medicine, and a group of scientists at Yale and M.I.T. confirmed that traditional Amish explanation. By employing the tools of molecular biology along with the handwritten genealogical records of Amish families, they showed that the mental disorder known as manic depression is indeed at least partly a matter of bloodlines. Their report, published in the journal Nature, conclusively linked cases of manic depression in an Amish family to genes in a specific region of human chromosome 11. "This is the first demonstration of a possible genetic basis...
...perhaps as many as 70% -- of Alzheimer's cases are inherited, the researchers began analyzing the DNA from four large families that had one thing in common: a history of the disease stretching back over many generations. After three years of work, they isolated two genetic markers, or molecular signposts, on chromosome 21 that are located close to the still unknown gene responsible for the inherited form of the disease. "The identification of these markers overcomes a major hurdle," says M.G.H. Neurogeneticist James Gusella, who directed the research. "This is the first step toward the identification of the primary cause...
...researchers concede some uncertainties: about the mutation rate, for example, and whether it is constant. Still, Stoneking says, the evidence shows that "mtDNA is a good molecule for tracing relationships between populations in general." And, adds Cann, "it is a way of welding molecular biology and anthropology. Sometimes fossils are misleading. We're trying to build better pictures of how humans evolved...
...choose tobacco? Says Howell: "Tobacco is the laboratory rat of plant molecular biologists. It's a model system that we use in these sorts of experiments." Responding to orders from the firefly-virus gene, the plants dutifully produced their own luciferase...