Fig. 3

Relative expression of genes encoding BBM enzymes in European seabass intestine. Relative expression of genes encoding BBM enzymes peptide transporter 1 (PepT-1), aminopeptidase N (APN), sucrose-isomaltase (SI) and sodium/potassium-transporting ATPase (Na⁺/K⁺ATPase) in European seabass pyloric caeca, proximal and distal intestine at the end of the 21-week feeding period. The relative expression (arbitrary units) was calculated as the expression of the target gene divided by that of β-actin multiplied by 100. Data are presented as the average + SEM of eight fish per group. Different letters indicate significant differences among dietary treatments (P < 0.05)