Nearly All Proteins Contain

Question

Nearly all proteins contain:
A) cobalt.
B) phosphorus.
C) selenium.
D) sulfur.
E) none of the above.

Accepted Answer

Sulfur is commonly found in amino acid residues that make up proteins, including cysteine and methionine. Therefore, nearly all proteins contain sulfur. Cobalt, phosphorus, and selenium are not commonly found in proteins.