Fig. 3

Effects of betaine on the expression of mTOR pathway genes in intestines of growing rabbits under the summer heat. A Duodenum; B Jejunum; C Ileum. mTOR Mammalian target of rapamycin, P70S6k1 P70 ribosomal protein S6 kinase 1, 4EBP-2 Eukaryotic initiation factor 4E-binding protein-2. ^a–c Different superscript lowercase letters indicate significant differences (P < 0.05). P¹, linear; P², quadratic