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. 2014 Oct 10;5:528. doi: 10.3389/fmicb.2014.00528

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Copyright © 2014 Torto-Alalibo, Purwantini, Lomax, Setubal, Mukhopadhyay and Tyler.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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The isopropanol, butanol ethanol (IBE) pathway described with the Gene Ontology. Butanol and propan-2-ol (asterisked) designated as advanced biofuels are naturally produced by the IBE pathway. Role of enzymes are labeled with appropriate GO Molecular Function term (sky blue). Processes leading to the production of each alcohol are designated with appropriate GO Biological Process term (tan). Relevant references are in the text. Figure is based on information provided in Lee et al. (2008b).