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. 2015 Apr 24;6:6900. doi: 10.1038/ncomms7900

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(a) Functional profile of these genes, which include 10 RNA genes and 110 protein-coding genes. Among the 110 protein-coding genes with COG assignments29, 48 genes encode subunits of known protein complexes. Percentages of such genes in each COG term were shown in columns. Genes are assigned to COG terms based on function. (b) Top: classification of PSs based on their location in the operon: 5′-UTR (uPS), intergenic spacers (iPS) or CDS (cPS). Bottom: one example of each of uPS, iPS and cPS was shown. (c) Distribution of operons that harbour PSs, iPSs, cPSs or uPSs among the Down, Flat, Up and Complex types of operons. The iPSs were enriched in the Complex type of operons (*P value <0.0001, hypergeometric test).