Stabilization of glucose oxidase with cyclodextrin-branched carboxymethylcellulose
Bibliographic record
Abstract
We present a methodology for improving some enzymatic characteristics of glucose oxidase (GOx) (EC 1.1.3.4). The enzyme was chemically modified with a ß-cyclodextrin-branched carboxymethylcellulose polymer (CMC-CD), using carbodiimide as coupling agent. The obtained neoglycoenzyme had 0.78 mol of polysaccharide per mol of GOx and retained 67% of its initial activity. Comparison of some characteristics of the modified and free enzymes showed a higher Km for derivatized GOx and better thermostability, which increased from 45 °C to 51 °C. In addition, derivatization of GOx with CMC-CD increased its resistance to inactivation at 45 °C by 2.2-fold, protected the molecule against inactivation with the anionic surfactant sodium dodecylsulphate to the point that it retained 75% of its activity after an incubation of 3 h, and extended its pH tolerance toward alkaline pH (7.5). Covalent glycosidation of glucose oxidase with CD-branched carboxymethylcellulose polymer constitutes therefore an effective strategy for enhancing the stability of this enzyme.
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 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 | 0.000 |
| 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 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".