Which of the following supports the ligand-mediated model of receptor dimerization?
A) Some growth and differentiation factors like PDGF or CSF-1 are composed of two similar or identical disulfide-linked subunits,each of which has a binding site for a receptor.
B) Ligands have been found to be small proteins.
C) Ligands have been found to be steroid hormones.
D) Ligands were found to bind to each other
E) Receptors have been shown to have multiple binding sites for ligands.
Correct Answer:
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