The <i>parS</i> site is the site of force exertion of the segregation process.

<p>Fractions of cells presenting 3 foci for two chromosomal tags in different genetics background (shown in top) are indicated in the wild type strain, and in a strain with an ectopic <i>parS</i>. Numbers of cell considered are shown below. Schematics of the different chromosomal configurations are represented; the position of the <i>parS</i> site is indicated in grey, the position of <i>oriC</i> in black, and chromosomal loci in blue and red. Strains IVGB292, IVGB168 and IVGB173 were used for the wild type background, as well as strains IVGB478 (Δ<i>parS1234 parS</i> +347 background), VLB140 (Δ<i>parS1234 parS</i> +552 background) and IVGB510 (Δ<i>parS1234 parS</i> -898 background).