Novel Dynamics of FtsZ Ring Before Plastid Abscission
Bibliographic record
Abstract
Plastids were derived from free-living cyanobacterium ancestors that were engulfed by a primary non-photosynthetic eukaryotic host cell and subsequently evolved into plastids. Consistent with their bacterial origin, plastids use the bacterial FtsZ ring, the gene of which was transferred to the host eukaryotic nucleus over evolutionary time. However, recent genome sequencing projects show that most of the other proteins once involved in bacterial division have been lost. Here we show, highly sensitive immunofluorescence analysis using plastid FtsZ antiserum revealed that plastid FtsZ forms two types of ring structures during plastid division: (i) the 1st FtsZ ring is formed at the division site to constitute the foundation of the plastid division machinery and (ii) the 2nd FtsZ ring is formed at a right angle with the 1st FtsZ ring. One notable point is that the 2nd FtsZ ring disappears at the end of plastid division. This result suggests that the nuclear encoded plastid FtsZ may function in daughter plastids, in addition to foundation of the plastid division machinery.
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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 | 0.001 | 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".