Fig. 1.

Effect of different protein sources on body mass and feed utilization a body mass development, b body mass gain, c energy intake and d feed efficiency in male C57BL/6J mice fed the experimental diets for 6 weeks. e Apparent nitrogen digestibility evaluated over 48 h after 4 weeks of feeding (Expt. 1). The data represent group mean values (n = 8) ± standard error. Data were analyzed by one-way analysis of variance followed by Tukey’s pair-wise comparisons. Mean values that do not share a letter are significantly different (P < 0.05)