Expression of SRY proteins in both normal and sex‐reversed XY fetal mouse gonads
Bibliographic record
Abstract
Sry, a single-copy gene on the Y-chromosome, acts dominantly to trigger differentiation of a testis from a gonadal primordium that otherwise develops into an ovary in mammals. Sry encodes a protein with a DNA-binding domain and probably acts as a transcription factor. However, the mode of SRY action in testis determination remains largely unknown. In the present study, we detected the endogenous SRY protein in normal XY fetal mouse gonads by Western blotting and immunohistochemistry. The tissue-specificity and ontogeny of the detected protein were consistent with those of Sry transcripts. Immunofluorescent double labeling revealed that the SRY protein was detected in the Sertoli cell lineage and was swiftly down-regulated concurrently with testis cord organization. Surprisingly, however, the SRY protein was detected in the entire gonad from the onset of its expression, not in parallel to the spatiotemporal pattern of testis cord organization. The SRY protein was also detected in the entire region of all B6.Y(TIR) fetal gonads, which were anticipated to undergo either partial or complete sex reversal. SRY down-regulation was considerably delayed, compared with control B6.XY gonads and was not associated with testis cord organization in B6.Y(TIR) gonads. We conclude that the testis-determining pathway is impaired at the site of SRY action in the B6.Y(TIR) gonad.
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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 | 0.000 |
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".