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Ras protein |
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Ras protein [¦är¦ā′es ‚prō‚tēn]
(cell and molecular biology) A GTPase that is part of a signaling cascade that controls cell growth; it turns itself off by hydrolyzing guanosine triphosphate (GTP) to guanosine diphosphate (GDP); however, if left in its active (GTP-bound) form, it can lead to uncontrollable cell growth, or cancer. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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