Abundance distribution of all identified proteins. Distributions are shown for the group of highly abundant proteins and the remaining low abundance protein group. Circles show distribution outliers as defined in Methods. The lower hinge represents the first quartile (25%) and the upper hinge the third quartile (75%). The high and low group were separated by clustering at a copy number cutoff of 2050 proteins per cell as described in Methods.
Ishihama et al. BMC Genomics 2008 9:102 doi:10.1186/1471-2164-9-102