Proximity Ligation Analysis (PLA) of protein-protein interactions between CRKL and PTPN11. Mahlavu cells were stained with CRKL rabbit purified polyclonal 1:600 and PTPN11 mouse purified polyclonal antibody 1:100. Signals were detected by 30 Detection Kit 613 (red), and nuclei were counterstained with DAPI (blue). Each red dot represents the detection of protein-protein interaction complex.