Expression level of MyoD and myogenin, performed by immunoblotting.

<p>The expression of MyoD (A) and myogenin (B), both are usually up-regulated during muscle regeneration, was measured in the injured muscles at day 2 and day 5, respectively. All values were corrected for GAPDH as a protein loading control. Results are expressed as a percentage of values obtained at day 0 (mean ± SEM, n = 3/group). Groups bearing different letters for a given time point are significantly different (p≤0.05). C, casein; CP, cod protein; C⁺, casein supplemented with L-arginine, glycine, L-taurine and L-lysine.