Engineering<i>Saccharomyces cerevisiae</i>fermentative pathways for the production of isobutanol
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
Background: Finite supplies of petroleum-based fossil fuels, in addition to concerns about carbon emissions and energy security, have driven the search for alternative fuels that can be produced from renewable resources. Butanol, pentanol and their isomers have significant advantages over ethanol as a biofuel and these can be produced by fermentation. Results: We demonstrate that yeast can be engineered to produce isobutanol by fermentation of carbohydrate precursors. This was achieved by increasing flux through the valine biosynthetic pathway in addition to decreasing pyruvate decarboxylase activity and increasing the availability of NADPH. We found no initial improvement in isobutanol production by deleting BAT1, LEU4 and LEU9, genes encoding enzymes predicted to compete with isobutanol synthesis. Conclusion: Yeast has potential as a factory for the production of higher alcohol biofuels; however, substantial engineering will be required to achieve economically viable production levels.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it