DETECTION OF A GROUP I (IE) FUNGAL INTRON IN THE GREEN ALGAL GENUS <i>UROSPORA</i> (ULVOPHYCEAE)<sup>1</sup>
Bibliographic record
Abstract
A group IE intron at position 989 (Escherichia coli numbering) in the 18S rRNA gene is described for the first time from the green algae based on primary and secondary structure analysis of the intron. The intron occurred in Urospora neglecta Kornmann, U. wormskioldii (Mertens) Rosenvinge, and in an undescribed taxon closely allied with U. wormskioldii. The Urospora intron was 397 or 399 bp in length, except for one variant, which was 652 bp in length. The latter intron appeared to be a chimera, consisting of a conspecific part, a segment more closely related to another species, and a region of unknown origin. A search of data bases containing introns indicated that the green algal intron is homologous with other 989 introns, all occurring in fungi, which may be the source of the Urospora intron. The introduction of this intron into the Urospora lineage has occurred within the last 14 million years, based on estimates of the earliest divergence of the genus from other members of the family Acrosiphoniaceae, all of which lack 18S introns.
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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 | 0.000 | 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 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".