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About the Cover

Cover Figure


COVER Fluorescent DNA fragments migrating through an acrylamide gel during electrophoresis. The photograph shows 65 capillaries (left to right) each containing a different sequencing reaction. Nearly 4 million such reactions were used to identify mutations in breast and colorectal cancers. See page 268. Image: D. Dressman

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