Protein purification

Skin covers the vast majority of the human body surface and performs essential functions including barrier defense, immune surveillance, regulation of temperature and fluid homeostasis, and sensory perception.

Endotoxin commonly refers to lipopolysaccharide (LPS) enriched in the outer leaflet of the outer membrane of Gram-negative bacteria.

In protein purification workflows, chromatography resins and magnetic beads are the core separation media that enable the fundamental sequence of “selective binding—washing—elution.” Differences in base matrices (e.g., agarose, dextran, synthetic polymers) and functionalization ...

GST (Glutathione S-transferase) tag is a commonly used fusion tag with a molecular weight of ~26 kDa and good water solubility. It is often used to improve soluble expression of hydrophobic proteins or proteins prone to inclusion body formation. Using chromatography resins immobilized with ...

His-Tagged Protein Purification

In studies of protein structure and function, antibody drug development, and enzyme engineering/production, the core of purification process design is to “select appropriate separation mechanisms based on the physicochemical properties of the protein, and rationally combine multiple ...

In protein biochemistry, salts appear in nearly every recipe. While their role in buffering is familiar, salts themselves can serve as practical tools for protein separation and purification. By tuning salt species and concentration, one can markedly alter protein solubility to achieve selective ...

When a target protein leaves its native intracellular environment during purification, hydrophobic surfaces can become exposed and misfolding can occur, leading to precipitation, denaturation, loss of activity, and reduced yield. Adding protective components to purification buffers can mimic ...

Protein precipitation is a classical technique in the early stages of protein purification. Its advantages include simple equipment, convenient operation, and the ability to concentrate samples while retaining yield. However, purity improvement is limited, so it is mainly used for preliminary ...

Chelating agents, derived from the Greek word "chelate," meaning crab claws, vividly describe the ring-like complexes formed with metal ions. These complexes generally exhibit high stability in aqueous solutions and resist dissociation, though under specific conditions, metal ions can be ...

In the process of nuclear protein extraction, the use of surfactants can significantly interfere with protein labeling efficiency. This is because surfactants can alter the conformation of proteins and may interact with the target protein, affecting its biological activity and the accuracy of ...

Label-free protein purification method?

By what way are proteins purified?