Conformational change
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In molecular biology, a protein may change its shape in order to undertake a new function; each possible shape is called a conformation, and a transition between them is called a conformational change.
It is usually the tertiary structure of the molecule that is affected, as it is usually this structure that determines a protein's function.
A conformational change may be induced with many scenarios, such as a change in temperature, pH, or the binding of a ligand to a receptor.
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