Proteins with Two Different Polypeptide Chains Are

Question

Proteins with two different polypeptide chains are:
A) monomeric proteins.
B) trimeric proteins.
C) homodimeric proteins.
D) heterodimeric proteins.
E) none of the above.

Accepted Answer

Heterodimeric proteins consist of two different polypeptide chains, while monomeric proteins have only one polypeptide chain, trimeric proteins have three identical polypeptide chains, and homodimeric proteins have two identical polypeptide chains.