Molecular Prodigality

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Science  21 Feb 2003:
Vol. 299, Issue 5610, pp. 1189-1190
DOI: 10.1126/science.1080010

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Proteins have the ability to exist in many different forms. In a Perspective, Dennis Bray discusses the astonishing breadth of protein diversity in cells, how it is generated, and ways in which we can investigate its significance.