Protein Structural Motifs Often Have General Functions in Common $\beta$ Barrel
B) Helix-Turn-Helix
C) Homeodomain
D) Leucine Zipper
E) Zinc

Multiple Choice

Protein structural motifs often have general functions in common. Which motif is known to be involved in protein dimer formation but not in direct protein-DNA interactions?

A) $\beta$ barrel
B) helix-turn-helix
C) homeodomain
D) leucine zipper
E) zinc finger