Historical Vignette: Hypophosphatasia: Molecular Diagnosis of Rathbun's Original Case
Bibliographic record
Abstract
In 1948, Dr. John Campbell Rathbun characterized the disorder "hypophosphatasia" when he reported paradoxically low levels of alkaline phosphatase (ALP) activity in blood and in several tissues from an infant who died with rickets and epilepsy, which seemed to reflect "a new developmental anomaly." Hypophosphatasia is now recognized to be an inborn error of metabolism featuring deficient activity of the tissue-nonspecific isoenzyme of ALP (TNSALP) caused by deactivating mutations in TNSALP. Here, we show, more than 50 years after Rathbun's case report, that analysis of the parental DNA indicates compound heterozygosity involving two missense mutations (G340A and A881C) in TNSALP caused the death of Rathbun's patient.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.004 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.002 | 0.001 |
| Science and technology studies | 0.002 | 0.002 |
| Scholarly communication | 0.001 | 0.002 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.008 | 0.007 |
| Insufficient payload (model declined to judge) | 0.003 | 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), 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".