... sub-strates of H+⁄ peptide cotransporters, such as Gly-Sar,Ala-Ala, Lys-Lys, Ala-Asp, d-Phe-Ala, Ala-Ala-Ala,d-aminolevulinic acid, cefadroxil and Ala-4-nitroanilide(all 100 lm, Table 1). Glycine, ... JC, Fujita T, Liang R, Ganapathy V & Lei-bach FH (1998) Identification of a potential substratebinding domain in the mammalian peptide transportersPEPT1 and PEPT2 using PEPT1-PEPT2 and PEPT2-PEPT1 ... chain in a short intramolecular distancefrom the a- carbon atom, is the N-terminal amino acid and l-Proline (l-Pro) is the C-terminal amino acid.The resulting compound, Bip-Pro, was tested with regard...