Update publication information. We employ Mass spectrum to investigate proteome of Pum1-Knockout, Pum2-Knockout and WT conditions in human colorectal cancer cell line Hct116. Overall design: In order to investigate whether Pum1 and Pum2 regulate their targets at their protein levels, we used Pum1-Knockout, Pum2-Knockout and WT Hct116 cell line to extract total protein for Mass spectrum.