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Making the Gradient

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Science's STKE  30 Jan 2007:
Vol. 2007, Issue 371, pp. tw38
DOI: 10.1126/stke.3712007tw38

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vol. 2007 no. 371 tw38

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  1. Stella M. Hurtley
  1. Science, AAAS, Cambridge CB2 1LQ, UK

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