Fig 2.

Overview of the organization of the PULs encoding the investigated CE15 enzymes, as predicted by the PULDB (35). Encoding species are listed above each PUL (with former names in parentheses where applicable), and locus tags are above each corresponding gene, drawn to scale. The top two PULs appear to target pectin; the middle might possibly target pectin-derived oligosaccharides, and the bottom two are unlikely to target pectin. Functional annotations are shown inside each gene symbol and are color coded following the PULDB color scheme: glycoside hydrolases in pink, proteins of unknown function in light gray, SusD-like binding proteins in orange, SusC-like transport proteins in violet, regulatory hybrid two-component systems and other regulatory factors (HTCSs, σ) in light blue, carbohydrate esterases in brown, polysaccharide lyases in purple, and carbohydrate-binding modules in green.