Fig. 1. Structure and composition of gut microbiota in pigs fed with intact casein or hydrolyzed casein.

A Principle-coordinate analysis by weighted UniFrac distance and the analysis of molecular variance. B The heatmap visualization of the relative abundance of top 30 genera. C Relative abundances of representative taxa. Abbreviations: Co colon, Du duodenum, Il ileum, Casein-intact intact casein group, Je jejunum, Casein-pep hydrolyzed casein group. *p < 0.05, **p < 0.01 between groups.