Figure 1. Top view of the three-dimensional structure of human B-FABP (PDB ID 1JJX), showing the native residues that were mutated to Cys residues in α-helix A1 (A) or in α-helix A2 (B).

Panel (C): front view of the three-dimensional structure of human B-FABP (PDB ID 1JJX), showing the residues that form the group I (magenta), and the residues which form group II (green) discussed in the text.