Protein purification techniques from "summary" of Molecular Cloning by Joseph Sambrook,David William Russell
Protein purification techniques are essential for isolating a protein of interest from a complex mixture of biomolecules. The first step in protein purification is to choose an appropriate source for the protein. This may be a tissue, cell culture, or microorganism that naturally produces the protein, or it may involve the use of recombinant DNA technology to express the protein in a host organism. Once the source of the protein has been identified, the next step is to disrupt the cells and release the protein. This can be achieved using mechanical methods such as sonication or homogenization, or by enzymatic methods such as lysozyme treatment. The resulting crude extract contains the protein of interest along with a multitude of other proteins and biomolecules. To separate the protein of interest from the other components in the crude extract, a variety of purification techniques can be employed. These techniques exploit the physical and chemical properties of proteins, such as size, charge, solubility, and binding affi...
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