Erk 1/2 phosphorylation in skeletal muscle pre-meal and 30, 90 min PP in rats assigned to CHO or PRO diet after 10 d of meal-feeding. Samples were collected after a 12 h overnight food deprivation and 30, 90 min PP. Values are means ± SEM. Means with an asterisk are different from time 0 (p < 0.05). n = 6/time point.