Viscoelastic properties and gelation of an elastin-like polypeptide
Why this work is in the frame
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Bibliographic record
Abstract
Tropoelastin, the native monomeric form of elastin, and elastin-like polypeptides undergo a process of temperature-induced phase separation (coacervation) resulting in self-organization of a polymeric network that can subsequently be cross-linked into an elastomeric polymer. In this study, the rheological properties of a recombinantly produced polypeptide mimicking the sequences and domain arrangements of tropoelastin were investigated to understand post-coacervation changes in structure and assembly. This polypeptide, designated EP20-24-24, consisted of three hydrophobic domains of native human tropoelastin flanking two cross-linking domains. Temperature-induced formation of coacervate droplets resulted in a small increase in viscosity. A higher temperature produced a second temperature-dependent transition (Tv) to a gel state characterized by a much higher viscosity, strong shear thinning, and a high ratio of storage to loss moduli. This gel state was fully reversible if the temperature was immediately lowered. However, incubation above Tv for 60 min resulted in a further transformation of the network, limiting thermal reversibility of the gelation process. These results demonstrate that for elastin-like polypeptides mimicking the sequence and domain arrangements of tropoelastin, temperature-induced coacervation and transition of the coacervate to a gel-like state are distinguishable events with separate transition temperatures. Moreover, gels formed by these elastin-like polypeptides undergo a process of maturation, reducing the reversibility of the gel state.
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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) | 0.000 | 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 it