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Science 24 November 2000:
Vol. 290. no. 5496, pp. 1478 - 1479
DOI: 10.1126/science.290.5496.1478
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News of the Week

CELL BIOLOGY:
Color-Changing Protein Times Gene Activity

Marina Chicurel

For years, researchers trying to capture the bustling activity of genes in living cells have mostly had to make do with snapshots, which clearly fell short of the mark. But now their frustration may be over. On page 1585, a team describes a new fluorescent protein that turns bright green when it is first made, then changes to red over several hours--providing the ability to witness how genes alter their activities over time.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)