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Usage pattern of NRP BB differs across bacterial phyla. (a) Common substrate BBs were grouped based on the physical and chemical properties of their side chains. Shown here were only representative BBs; see Table S1 for the full list of BBs in each group. (b) The Ω values were calculated for a group of BBs for all predictions (overall) and for each bacteria phyla; “n/a” indicates that no predictions fall in that group.
