glutathione overview of its protective roles measurement andbiosynthesis and biosynthesis The Biological Functions of Glutathione Mode of action of Glutathione

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Fyhrquist et al

Key Takeaways Protease cleavage failure is common: Even well-designed constructs frequently show incomplete or absent tag removal Steric hindrance is the #1 cause: Cleavage sites too close to structured regions are inaccessible Non-specific cleavage is a hidden problem: Proteases like thrombin can damage your protein at unexpected sites Protease choice matters: TEV, HRV3C, thrombin, and SUMO protease have different strengths and limitations Incomplete cleavage creates purification nightmares: Separating cleaved from uncleaved protein is often harder than the original purification The Tag Removal Challenge Why We Use Tags Affinity tags revolutionized protein purification: His-tag: Simple, universal, small GST: Improves solubility, large but easy to remove MBP: Excellent solubility enhancement SUMO: Enhances folding, clean removal Strep-tag: Mild elution conditions Without tags, purification requires protein-specific method development