Fig. 2

Effects of a low-protein diet supplemented with rumen-protected amino acids on microbial functional potentials in the colon of lambs. A Chao1 index based on gene profile. B Principal coordinate analysis (PCoA) based on Bray–Curtis dissimilarity of gene profile. C–D Differential KEGG pathways based on GRSA enrichment analysis of LP vs. CON (C) and LR vs. LP (D)