What is the defining characteristic of an allosteric protein?
A)They contain two polypeptide chains,with each being an exact mirror image of the other.
B)They contain only one ligand-binding site,but because the specificity is low,many different ligands can bind to it.
C)They contain two ligand-binding sites,one that activates the protein when a ligand binds,and the other that inactivates the protein when the same ligand binds.
D)They contain more than one ligand-binding site,and noncovalent binding of a ligand to one site alters the shape of other ligand-binding sites.
E)They contain no binding sites of their own,but act by modulating the activity of other proteins.

Question

Quizplus · Accepted Answer

Allosteric proteins contain more than one ligand-binding site, and noncovalent binding of a ligand to one site alters the shape of other ligand-binding sites. This results in either activation or inhibition of the protein's function.

What Is the Defining Characteristic of an Allosteric Protein