Diguanosine nucleotide metabolism and the survival of artemia embryos during years of continuous anoxia
Bibliographic record
Abstract
Encysted embryos of the primitive crustacean, Artemia franciscana, are remarkably resistant to a variety of harsh environmental conditions, including continuous anoxia for periods of years at physiological temperatures and water contents. Previous study produced no evidence of an ongoing anoxic metabolism, suggesting that these embryos remained viable in spite of the lack of detectable free energy flow and biosynthesis. That seeming violation of a major axiom of cell biology and biochemistry prompted us to re-examine the nucleotide pool of encysted embryos during prolonged anoxia. We found that the nucleotide Gp(4)G, present initially in very large amounts, decreased slowly as anoxia continued over the 5.6-year period examined. Studies on other nucleotides and associated enzymes, including results from previous papers, provide a plausible metabolic pathway leading to the provision of ATP and GTP to meet the needs of endergonic processes in anoxic embryos. Exactly what those processes are is not obvious. One possibility involves the extensive anoxia-induced nuclear translocation of the stress protein, molecular chaperone p26, whose large molecular mass (approximately 500 kDa) most likely requires a supply of free energy to cross the nuclear envelope. Support for this possibility comes from our finding here that p26 is also a GTPase.
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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 | 0.000 | 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 | 0.001 |
| 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 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".