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Microbiology

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TAILOR-MADE  A semisynthetic strain of Escherichia coli makes glowing green proteins using amino acids not found in nature.

horseshoe bat

GOING VIRAL  Genetic studies of viruses from horseshoe bats (shown) in one cave in China suggest the animals are reservoirs of SARS coronaviruses. Bats harbor many viruses that can sometimes infect people, including Ebola and Marburg.

Candida tropicalis

SHAPE SHIFTER  Candida tropicalis usually grows as a harmless roundish budding yeast (green), but in the presence of two bacteria it stretches into long filaments (brown) that may provoke inflammation in intestines.

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