<p>A. Orientation of the genes up- and down-stream of the intergenic region 1 (Inter-1). The sequences of Inter-1 in C180-2, C180-2FR, <i>S</i>. <i>mutans</i> UA159, <i>S</i>. <i>mutans</i> LJ23, <i>S</i>. <i>mutans</i> NN2025 and <i>S</i>. <i>mutans</i> GS5 are given in the blue bar. The red letter indicates the SNP; the purple box indicates the TATAAT box; the red box indicates the transcription start site of the operon; B. Orientation of the genes up- and down-stream of the intergenic region 2 (Inter-2). In both A and B, the red lines indicate the location of the SNPs.</p
