<i>At</i>RabF2b (Ara7) acts on the vacuolar trafficking pathway in tobacco leaf epidermal cells
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Bibliographic record
Abstract
Rab GTPases are universal key regulators of intracellular secretory trafficking events. In particular, Rab 5 homologues have been implicated in endocytic events and in the vacuolar pathway. In this study, we investigate the location and function of a member of this family, AtRabF2b (Ara7) in tobacco (Nicotiana tabacum) leaf epidermal cells using a live cell imaging approach. Fluorescent-tagged AtRabF2b[wt] localized to the prevacuolar compartment and Golgi apparatus, as determined by coexpression studies with fluorescent markers for these compartments. Mutations that impair AtRabF2b function also alter the subcellular location of the GTPase. In addition, coexpression studies of the protein with the vacuole-targeted aleurain-green fluorescent protein (GFP) and rescue experiments with wild-type AtRabF2b indicate that the dominant-negative mutant of AtRabF2b causes the vacuolar marker to be secreted to the apoplast. Our results indicate a clear role of AtRabF2b in the vacuolar trafficking pathway.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.002 | 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 it