PTPRC and neoplasm: In order to measure the protein expression of the ImP subunits, we designed immunofluorescence (IF) panels that allow for the co-staining of PSMB8 or PSMB9 together with cytokeratins 8 and 18 (CK8-18) that mark epithelial (tumor) cells, CD45 to identify immune cells and DAPI to detect nuclei from all cells.