An investigation of yolk-protein localization in the testes of the starfish Pisaster ochraceus
Bibliographic record
Abstract
The distribution of the yolk epitope, PY4F8, was studied in the testes of the starfish Pisaster ochraceus (Brandt, 1835). Western blots have revealed that testes only show one 180 kDa band, whereas ovaries exhibit four PY4F8 bands at 90, 110, 120, and 180 kDa. This finding suggests that male yolk is less complex than female yolk. It was shown that PY4F8-positive material abounds in the hemal sinus of testes. Moreover, this epitope was found in the basal lamina, in the lumen of the testes, and in the cytoplasm of auxiliary and spermatogenic cells. It is likely that a hemal testis barrier is absent in P. ochraceus, and this lack allows direct penetration of nutrition to sustain metabolism of both spermatogenic and auxiliary cells. Morphologically, this penetration is possible through the gaps between adjacent auxiliary cell bases. Yolk granules containing the PY4F8 epitope are located in spermatogonia and spermatocytes, but not in spermatids and sperm. Therefore, yolk may play an important role in early spermatogenesis, but it does not participate at the final stage of sperm formation.
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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) | 0.001 | 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".