Fig. 4.

Automated molecular docking of YGIKVGYAIP (A), GGIF (B), and GIFE (C) at the angiotensin-converting enzyme (ACE) active site. ACE hydrophobic residues are represented in green, positively charged residues in blue, and negatively charged residues in red and hydrogen bonds as purple arrow, polar residues in turquoise color, while other residues and the zinc atom are represented automatically. Image obtained with Accelrys DS Visualizer software. (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)