Protein extraction method - extraction tank

Protein extraction involves various methods depending on the protein type and source. Most proteins are soluble in water, dilute salt, acid, or alkaline solutions, while some lipid-bound proteins require organic solvents like ethanol or acetone. Protein solubility is influenced by internal factors such as molecular structure and external factors like temperature, pH, and ionic strength.

For intracellular proteins, cell disruption is followed by dissolution in suitable solvents (e.g., water, dilute hydrochloric acid, or buffers), with insoluble components removed by centrifugation. Proteins like globulins are soluble in dilute salt solutions, while lipoproteins require detergents or organic solvents. Insoluble proteins, such as keratin, are extracted using alkaline solutions. Proper pH control with buffers enhances protein stability and solubility during extraction.