Molecular Mimicry in Mercury Toxicology
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
Molecular mimicry occurs when one molecular entity is "mistaken" for another by cellular or other biological processes, and is thought to arise from structural similarities between the two molecules in question. It has been postulated by others to be important in the mechanism of uptake of toxic metal species into living tissues. A widely accepted example is the transport of methylmercury-cysteine species, which are thought to mimic the amino acid methionine. We have used mass spectrometry and mercury L(III)-edge X-ray absorption spectroscopy to understand the solution structure of complexes between methylmercury and cysteine. With a view to understanding the basis of the suggested molecular mimicry mechanisms, we have used computational chemistry to compare the structure of methionine with that of the dominant solution species L-cysteinato(methyl)mercury(II), and the structure of cystine with that of mercury(II) bis-L-cysteineate. We conclude that the structural similarities between metal compounds and natural products are insufficient to support a mechanism based on molecular mimicry, but instead, mechanisms involving a less-specific mimicry based on similarity with the L(alpha) region of the amino acid part of the molecule.
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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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 0.001 |
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