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PT annotation across the pf0-1 genome. From the outer to inner circles: 1 and 2 (forward, reverse strands), PT sites in ORFs (gray), RNA (blue) and nonencoding regions (red); 3 and 4, predicted protein-coding sequences colored according to COG functional categories; 5, tRNA/rRNA operons; 6, guanine–cytosine content; 7, guanine–cytosine skew.
