<i>Drosophila</i> Embryo: Maternal Interactions in Specification of the Anterior–Posterior Axis
Bibliographic record
Abstract
Abstract Studies of the maternal processes that specify the Drosophila anteroposterior embryonic axis have yielded rich insight into various biological processes required for animal development. As the oocyte is a single cell with a single, largely quiescent nucleus, polarising and symmetry‐breaking events must be executed through molecular mechanisms other than transcriptional control. These include intercellular interactions such as signal transduction and differential cell adhesion. mRNA‐based mechanisms are also prominent in establishing the anteroposterior embryonic axis. Specific mRNAs become enriched at the anterior or posterior poles through motor‐protein driven microtubule‐dependent transport, or through bulk cytoplasmic movement followed by anchoring. Proteins encoded by these mRNAs establish gradients through spatiotemporal control of translation and by diffusion coupled with degradation. Ovary structure determines the activities of polarising pathways that establish the anteroposterior embryonic axis. Initial asymmetries correlate with unequal cell divisions, a polarised cytoskeleton and differential cell adhesion. Germ cell – follicle cell interactions establish and maintain polarity in developing follicles. Microtubule‐dependent mRNA localisation is critical to axis establishment. Localised determinants initiate regulatory cascades that establish the anteroposterior body axis of the embryo and specify primordial germ cells. Various ribonucleoprotein complexes (RNPs) are essential for germ line development and for axis formation. Phase transition of proteins with intrinsically disordered domains are involved in the formation of several classes of these RNPs.
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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) | 0.016 | 0.008 |
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".