Fig. 3

Distribution of β-galactosidases selected for functional assessment across the five bifidobacterial reference strains. a Similarity plot showing the percentage of similarity of the 20 selected β-galactosidases across the reference strains (cut-off of 70% of identity over 90% of protein length). For each gene the relative cluster of appartenance from comparative genomics is also indicated. b Hierarchical clustering analysis showing the co-occurrence of the 20 selected β-galactosidases and their cluster of orthology across the reference genomes and bifidobacterial (sub)species