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Reference.org
Nucleotide exchange factor
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<p>Nucleotide exchange factors (NEFs) are <a href="/facts/Protein/Jxmagu3E">proteins</a> that stimulate the exchange (replacement) of <a href="/facts/Nucleoside/G40crf0F">nucleoside</a> <a href="/facts/Diphosphate/L9FPEkhF">diphosphates</a> for nucleoside <a href="/facts/Triphosphate/f4ykkLuK">triphosphates</a> bound to other proteins. </p>