Figure 3.

Concentration dependent uptake of GABA across the apical membrane of Caco-2 cell monolayers. Uptake was determined for 60s at apical pH 5.5 (basolateral pH 7.4) in the absence of extracellular Na⁺. Results are expressed as pmol.cm⁻².min⁻¹ (mean±s.e.mean, n=9–10). The curve was fitted using FigP.