Fig. 4

Co-staining of L. lactis NZ9000 and recombinant G protein in flounder intestine on 3rd day after feeding. a The merged picture of b–d (bar = 50 µm); the corresponding enlarged drawing was shown in the upper left of the picture, bar = 5 µm. b Cell nucleus were stained in blue by DAPI. c L. lactis NZ9000 was stained in red. d The expressed G protein was stained in green. LP lamina propria, Lu lumen; IEC intestinal epithelial cells