Quantum Chemical Study for Radical-Induced DNA Effects and Damage
Bibliographic record
Abstract
Differences in molecular interaction between bases (adenine (A), guanine (G), and cytosine (C)) and the methyl (Me)-radical were investigated by perturbation analysis using the quantum chemical method. Part of the source of damage to the DNA was elucidated at the molecular level. In the reaction of each of the saccharide derivatives (dA, dG, and dC) with Me-radical, the reactivity of dG (≈dA) is more than about 10 times larger than that of dC. Therefore, it is expected that the base G (and A) was more than about 10 times than the base C in radical-reactivity of the base. For the reaction of dA and dG with the radical, the C(8) site of the partial purine ring of dA and dG, and the C(5) site of the pyrimidine ring of dC were the main reaction sites for methylation. In the reaction of DNA composed of hydrogen-bonded base pairs G-C and A-T with the radical, the purine ring in the constituent base G reacted preferentially with the radical to yield 8-methyl-guanines.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.000 |
| 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 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".