Effects of in vitro and ex vivo simulated digestion on rTBL-1. Simultaneous gastric and intestinal in vitro digestion of rTBL-1 was carried out, and the protein was determined at 30 and 60 min (280 nm). (A) Bioaccessibility. (B) Apparent permeability coefficient (Papp) and efflux ratio (ER) during the intestinal incubation. The results are expressed as the mean ± SD of three independent experiments in triplicates. The asterisks express significant differences (p ≤ 0.05) by t-student test for each pair of data between 30 and 60 min. AP, apical side; BL, basolateral side; GC, gastric content; NDF, non-digestible fraction; DF, digestible fraction; Papp, apparent permeability coefficient.