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      Scientific American December 1992

      Essential but Expendable

      When do master genes regulate cell growth?

      • By John Rennie on December 1, 1992

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      More in the December 1992 issue of Scientific American
      • 50 and 100 Years Ago: December 1992
      • Annual Index 1992
      • Letters to the Editors, December 1992
      View Full Contents
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