Figure 2From: Pentacycloundecane lactam vs lactone norstatine type protease HIV inhibitors: binding energy calculations and DFT study Structures of PCU-lactam-NH-EAIS and PCU-lactone-CO-EAIS peptide inhibitors and their corresponding PCU-models. E: Glutamic acid; A: Alanine; I: Isoleucine; S: Serine (Note that the PCU-models consist of two enantiomers. The cage peptides therefore exist as two diastereomers).Back to article page