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Five neurodegenerative diseases are caused by proteins with expanded polyglutamine domains. Toxicity of these proteins has been previously identified only in mammals, and no simple model systems are available. In this paper, we demonstrate in E. coli that long polyglutamine domains (59-81 residues) as GST-fusion proteins inhibit growth while smaller glutamine (10-35 residues) or polyalanine (61...
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