Cloning and expression of pectinase gene from two forest soil bacteria, Streptomyces sp.
Bibliographic record
Abstract
Pectinase is a prominent industrial enzyme with a high market demand and huge applications in diverse avenues. There are different sources for pectinase production; however, a highly stable microbial pectinase that can withstand different physiochemical conditions is needed. Therefore, this study explored the thermostability of the pectinase protein cloned and expressed in Escherichia coli BL21(DE3) from two forest soil bacteria (S-5 and S-14) identified as Streptomyces sp. The pectinase gene illustrated about 750 bp on the gel after electrophoresis and encoded a product of approximately 25 kDa molecular weight. Both expressed pectinase proteins showed optimal activity at 2 different pHs (pH 5 and 9) and 50 ℃. When both recombinant pectinases were exposed to different temperatures, they were able to retain their activity for 120 min indicating both have important thermostable properties. These enzymes could have great potential in industrial biotechnological processes due to their stability over broad pH and high temperatures.
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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 | 0.000 | 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".