Cell Geometry and Membrane Protein Crowding Constrain <i>Escherichia coli</i> Growth Rate, Overflow Metabolism, Respiration, and Maintenance Energy
Bibliographic record
Abstract
K-12 strains MG1655 and NCM3722. The strains are genetically similar but differ in surface area to volume (SA:V) ratios by up to 30%, maximum growth rates on glucose media by 40%, and overflow-inducing growth rates by 80%. The predictions were tested against experimental evidence including phenomics data, membrane proteomics data, and MG1655 SA:V mutant growth rates. The predictions were remarkably consistent with experimental data and provided a membrane-centric explanation for maximum growth rate, maintenance energy generation, respiration chain efficiency (P/O number), and optimal biomass yield of a strain. These analyses did not consider cytosolic macromolecular crowding, highlighting the distinct properties of the presented theory and gaps in current cell biology literature. Cell geometry and membrane protein crowding are significant biophysical constraints and consideration of both provide a more complete theoretical framework for improved understanding and control of cell biology.
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How this classification was reachedexpand
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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| 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 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".