Table 1. Inhibitory Activity of Enantiomeric and Racemic Phosphorus-Containing Analogs of Amino Acids: Phosphonic Acid Analog of Leucine (3), Phosphonic (4) and H-Phosphinic (5) Acid Analogs of Homophenylalanine toward N. meningitides APN, Human (H. sapiens) APN, and Porcine (S. scrofa) APN and Porcine LAP.