passages.id: split_8_test_2344_passage
passages.type: progene_text
passages.text: By measuring the pH in Caco-2 cells loaded with the pH - sensitive fluorescent dye 2',7'-bis(2-carboxyethyl)-5-(6)-carboxyfluorescein , we show that cefixime transport mediated by the intestinal H + - coupled peptide transporter PEPT1 leads to intracellular acidification .