Circular representation of S. pneumoniae AP200 chromosome. Outer circle: distribution of the exogenous elements ϕSpn_200 and Tn1806 (dark blue). Second and third circles: predicted coding sequences on the plus and minus strand, respectively. Each circle has been divided in 4 rings according to the predicted functions:(from outer to inner ring) proteins poorly characterized, proteins involved in metabolism, proteins involved in information, storage and processing, proteins involved in cellular processes. Fourth circle: GC content. Fifth circle: GC deviation. Sixth and seventh circles: tRNA (dark green) and rRNA (red) on the plus and minus strand, respectively.