Figure 4
From: Persistence drives gene clustering in bacterial genomes
![Figure 4](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2F1471-2164-9-4/MediaObjects/12864_2007_Article_1198_Fig4_HTML.jpg)
Two modes symbolizing persistent genes distributions along chromosomes. Under mode A, persistent genes are organized into clusters. Supposing that 15 gene deletions occurred, only 2 lead to the deletion of persistent genes. Under mode B persistent genes are uniformly distributed and 9 out of the same 15 gene deletions involve persistent genes.