Galectin 3‐binding protein is a potential contaminant of recombinantly produced factor IX
Bibliographic record
Abstract
Haemophilia B, or factor IX (FIX) deficiency, represents 15% of the hereditary haemophilias. The serious morbidity from the transmission of infectious agents in plasma-derived material has mandated a need for the production of recombinant product. The rate-limiting step for the production of recombinant FIX is gamma-carboxylation, a post-translational modification carried out only in mammalian cells. To test the carboxylation efficiency of recombinantly produced FIX in vitro and to improve the isolation of the pure active product, we produced FIX in a transfected human cell line (293 human embryonic kidney cells) and isolated material by immunoaffinity chromatography followed by hydroxyapatite chromatography. Unexpectedly, during hydroxyapatite chromatography, we discovered that purified FIX was contaminated by a heretofore unknown protein. Further analysis by mass spectrometry (MS) sequencing revealed this protein to be galectin-3-binding protein (G3BP). The above results raise an important note of caution regarding the production of recombinant FIX and, indeed, other proteins produced recombinantly in mammalian cells.
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 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 | 0.000 | 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) | 0.001 | 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 teacher head, 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".