binding site
noun
plural binding sites
: a location on a molecule or cell surface at which a chemical substance (such as an element or molecule) can bind (see bind entry 1 sense 5b)
A ligand is a molecule or ion whose shape is complementary to the shape of a binding site on a particular protein molecule.—Gary A. Thibodeau
… the most favorable binding site of atomic antimony is the terminal carbon …—Zhenjun Song et al.
The main calcium binding site within each monomer involves the main chain oxygen atom …—Brian A. Fox et al.
Note: A binding site may demonstrate specificity for a particular chemical substance.
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Merriam-Webster unabridged
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