Bibliographic record
Abstract
The outer epidermal cell walls of plant shoots are covered with a cuticle, a continuous lipid structure that protects plants from desiccation, UV‐light, pathogens, and insects. The cuticle is composed of cutin polymer matrix embedded and coated with waxes. Major wax components are derived from very‐long‐chain fatty acid (VLCFA) precursors with chain lengths between C24 and C34. We are taking advantage of wax‐deficient eceriferum (cer) mutants in Arabidopsis to identify and functionally characterize gene products involved in wax biosynthesis, wax export to the cuticle, and regulation of these processes. I will describe our work on the cer2 mutant, which resulted in the identification of a novel component of fatty acid elongation machinery required for the extension of acyl chains beyond C28. This process is unique to plants where C30‐C34 VLCFAs are used for the production of cuticular wax and the pollen coat, critical for pollen hydration. The core VLCFA elongation complex involves four proteins. Condensing enzymes catalyze the first elongation reaction and determine the chain length of fatty acid products. While necessary for the production of all VLCFAs, known condensing enzymes cannot produce VLCFAs longer than C28. Heterologous expression in yeast revealed that CER2 protein could modify the chain‐length specificity of a condensing enzyme, CER6, from C28 to C30. We identified two CER2 homologs in Arabidopsis. Results of our investigation of the specificities and physiological roles of this protein family will be discussed.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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) | 0.001 | 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 | 0.003 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.003 | 0.001 |
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".