What is the main difference between protein domains and protein subunits? A. Dom

Question

What is the main difference between protein domains and protein subunits?

A. Domains are composed mostly of the -helix, while subunits contain both -helices and -strands.

B. Each subunit is a separate polypeptide chain, while domains usually constitute a part of a polypeptide chain

C. Protein domains do not have secondary structure, whereas protein subunits always have secondary structures

D. The tertiary structure of domains is stabilized by hydrogen bonds, while the structure of subunits is stabilized by disulfide bonds

E. Domains are parts of membrane proteins, while subunits are parts of water-soluble proteins

Explanation / Answer

The main difference between protein domain and protein subunits is,

B. Each subunit is a separate polypeptide chain, while domains usually constitute a part of a polypeptide chain

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