... Gly-Gln, Ala-Ala, Ala-Ala-Ala, Lys-Lys, d-aminolevulinic acid, cefadroxil,Gly, Pro-Ala, 8-aminooctanoic acid and Gly-Sar were from Sigma-Aldrich (Deisenhofen, Germany). Tert. butyloxycar-bonyl ... was subtracted from the total uptake to calculate the carrier-mediated uptake. Inset:Eadie–Hofstee transformation of the specific Gly-Sar uptake data[S, Gly-Sar concentration (mM); v, uptake ... h. The amount of Bip-Pro in the extracellular uptake mediumwas quantified according to the laboratory standard HPLC(La-ChromÒ; Merck-Hitachi, Darmstadt, Germany) with a diode array detector and...