| 1USG | A: | L-LEUCINE-BINDING PROTEIN, APO FORM | 
  | 1USI | A:; C: | L-LEUCINE-BINDING PROTEIN WITH PHENYLALANINE BOUND | 
  | 1USK | A:; B:; C:; D: | L-LEUCINE-BINDING PROTEIN WITH LEUCINE BOUND | 
  | 2LBP | A: | STRUCTURE OF THE L-LEUCINE-BINDING PROTEIN REFINED AT 2.4 ANGSTROMS RESOLUTION AND COMPARISON WITH THE LEU(SLASH) ILE(SLASH)VAL-BINDING PROTEIN STRUCTURE |