Interactions between canine plasminogen and 8-anilino-1-naphthalene sulfonate: structural insights from a fluorescent probe.
Bibliographic record
Abstract
Canine plasminogen (DPgn) binds the fluorescent molecule, 8-anilino-1-naphthalene sulfonate (ANS). Binding is favored by low pH as shown by steady-state fluorescence, native PAGE and isothermal titration calorimetry. Binding occurs at multiple sites. A strong site binds ANS with a Ka of 3.3 x 10(4) M(-1). Two weaker sites were observed with association constants of 6.2 x 10(3) M(-1) and 360 M(-1), respectively. ANS binds equally well to both the closed and opened conformations of DPgn at pH 3.0. At low pH there are changes in protein tertiary structure as monitored by sedimentation velocity analysis and circular dichroism. Binding sites for ANS were located in the proteolytic domain as well as the kringle domains. However, it is unlikely that binding occurs within the lysine binding sites of each respective kringle. Taken together, the data suggest that ANS may be binding to a pH induced molten globule state of DPgn.
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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 | 0.001 | 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".