The GC content of the genomes of "P. stutzeri" strains falls between 60 – 66 mol%. "P. stutzeri" strain DSM4166 is a strain that has been studied and shown specifically to have exactly 61.74% GC content in its circular chromosome. While this strain appears to have no plasmid in coordination with its chromosome, it is thought that the strain has 59 tRNA genes and 4 rRNA operons. When doing global genome comparisons between multiple "P. stutzeri" strains, it has been found that many of the genomic regions of this bacterium's genome are conserved between varying strains. One of the strains that has been found to vary is strain RCH2. This strain has an extra 244 genes which are believed to aid the bacterium in chemotaxis and in the formation of both a pilus and the pyruvate/ 2-oxoglutarate complex. When this strain was sequenced, it was found to have a 4.6 Mb circular chromosome and three plasmids.