Fig. 2.

Assembly artefact in the genome of S. marcescens strain N4–5. (a) Gel image representing the expected band size of 755 bp for a single 5S gene and its flanking regions. Band sizes are given in bp. (b) Schematic representation of the ribosomal operon with the assembly artefact in the genome of strain N4–5. Both DNA strands are represented. The rRNA genes are represented in dark blue, the gene metA is shown in light blue, the spacers in the ribosomal operon in grey, and the intergenic region between metA and the ribosomal operon in yellow. The black arrows indicate the extra copies of the 5S gene in both DNA strands. This genomic region is not drawn to scale. (c) Ribosomal operon without the assembly artefact in strain N4–5