Molecular characterization of two vitellogenin genes from the tick, Amblyomma hebraeum (Acari: Ixodidae)
Bibliographic record
Abstract
We have identified full-length cDNAs encoding two vitellogenins (Vg) from the African bont tick Amblyomma hebraeum Koch (1844). Vg is a large storage protein that is the precursor to vitellin (Vn), the major yolk protein found in eggs. The first Vg cDNA is 5866 bp long, with a 5715 bp reading frame encoding a 1904 amino acid protein. The second Vg cDNA is 5963 bp long, with a 5781 open reading frame encoding a 1926 amino acid protein. Both proteins possess a short N-terminal signal peptide of 21 and 16 amino acids respectively, which following cleavage result in 213.8 kDa Vg1 and 215.9 kDa Vg2 proteins. The conceptual amino acid translations for both proteins show the N-terminal lipid binding domain, the internal DUF1943 domain and the C-terminal von Willebrand factor type D domain common to all other known Vgs. In addition, these sequences do not resemble any of the conserved sequences that are the hallmarks of the highly similar tick storage protein (carrier protein; CP). Phylogenetic analysis indicates that the Vgs isolated in this study cluster together with other tick Vgs. Using RT-PCR, both Vg1 and Vg2 were expressed only in mated females, and only after they had fed to repletion. In situ hybridizations indicated that both Vgs were expressed only in the midgut and fat body of these females, and was not present in any other female tissues, nor in either fed or unfed males.
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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 | 0.001 |
| 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".