Proteins fold into complex three$-$dimensional shapes. The function is dependent upon the structure of the protein and its cellular location. The final shape of the protein is based on the identity of the amino acid side chains of the protein.

Most proteins have hydrophobic interiors with very few water molecules present.

What type of amino acids would you expect to find in the interior of these proteins?

A nonpolar

B

polar neutral

C

polar acidic

D

polar basic

E

any of the polar side chains