Expressing Full-Length Functional PfEMP1 Proteins in the HEK293 Expression System
Bibliographic record
Abstract
Due to the A/T-richness of the genome of Plasmodium falciparum, expressing P. falciparum proteins in heterologous expression systems is challenging. In addition, many P. falciparum proteins have high cysteine content and high molecular weight, which further complicates expression of these proteins in heterologous systems. The high molecular weight Plasmodium falciparum Erythrocyte Membrane Protein 1 (PfEMP1) adhesins expressed on the surface of the infected erythrocytes are among the most difficult proteins to express. Cost reduction in synthetic gene synthesis, as well as improved eukaryotic expression systems, now makes it possible to express such proteins. In this chapter, we describe the construction, production, purification, and functional assessment of the full-length extracellular region of the var2CSA PfEMP1 protein involved in pregnancy-associated malaria (PAM), using a human embryonic kidney (HEK) expression system.
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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 | 0.004 | 0.001 |
| 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) | 0.000 | 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 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".