Analysis of cetacean DNA: II. Localization of 18S and 28S ribosomal RNA cistrons in a heavy DNA component
Bibliographic record
Abstract
DNA was extracted from 10 cetacean species. Three species belong to the sub-order Mysticeti (baleen whales) and seven to the Odontoceti (toothed whales). Isopycnic centrifugation of these DNAs to equilibrium in neutral CsCl shows the following features in the analytical ultracentrifuge. The main band has an average buoyant density of 1.700 g/ml. A satellite (“shoulder”) appears in four species: Balaenoptera acutorostrata, B. borealis, Platanista indi and Physeter catodon with a buoyant density of 1.710, 1.708, 1.714 and 1.720 g/ml, respectively. In most species the main band also shows a pronounced asymmetry being wider on the heavy side and its top was seen to be divided into two components in one species. B. physalus 28S and 18S H3 RNA of high specific activity were hybridized with B. physalus unlabelled DNA. The position of the 28S and 18S hybridization peaks corresponds to a buoyant density of circa 1.705 g/ml. This location is different from that of the satellites observed in the other balenopterid species.
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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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 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) | 0.002 | 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 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".