= Meir Wilchek
{c}
<Meir Wilchek> is a <biochemist> whose work helped establish <affinity chromatography> as a practical method of <protein purification>. His collaboration with <Pedro Cuatrecasas> used selective <molecular recognition> to retain a desired protein on a ligand-bearing support, connecting a biochemical interaction to a separation method.<Pedro Cuatrecasas by Alan R. Saltiel>[p. 2, collaboration with Wilchek and development of affinity methods]{ref}
The central idea differs from simply sorting proteins by size. An immobilized <ligand (biochemistry)> supplies a binding partner for the target, while the experiment must still control unwanted retention and recover useful protein. The combination of specificity and reversibility makes a molecular interaction into an analytical tool.
For an illustrative comparison, two proteins of similar mass may behave differently on a column if only one recognizes the attached ligand. Conversely, a tightly retained protein is not automatically the intended target. Identity measurements and controls remain necessary. Wilchek's contribution is scientifically interesting because it makes biological selectivity useful for experimental isolation, rather than treating recognition only as a phenomenon to describe.<Pedro Cuatrecasas by Alan R. Saltiel>[p. 2, ligand immobilization and selective isolation]{ref}
\Image[https://www.weizmann.ac.il/Biomolecular_Sciences/sites/Biomolecular_Sciences/files/styles/medium/public/externals/a3bcd6b6e18dc7de1b7074dc7752b126.jpg?itok=BgAW4PVX]
{title=Portrait of <Meir Wilchek>}
{description=Photograph explicitly identified as Wilchek Meir in the https://www.weizmann.ac.il/Biomolecular_Sciences/faculty[official departmental directory].}
{width=200}
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