Cover photograph (Copyright © 2007, American Society for Microbiology. All Rights Reserved.): Binding of an ACE-inhibitory peptide (LVYPFPGPIHNSLPQN) to the three-dimensional structure of ACE. The binding site of the peptides on the structure was predicted using the docking software ESCHER-NG. The output of this was converted to a structural file with VEGA ZZ, and the results were visualized with the graphical program CHIMERA. The ACE structure is depicted in green, with the ACE-inhibitory peptide in red. (See related article on page 4658.)