The Most Common Motif Found in Membrane-Spanning Proteins Is

Multiple Choice

The most common motif found in membrane-spanning proteins is:

A) α helices of nonpolar amino acids that pass through the membrane.
B) αhelices of charged amino acids that form channels via extensive hydrogen bonding.
C) a triple helix of ɑ helices.
D) a helix-turn-helix arrangement of the peptide strands.
E) None of the above.