To this end, we ectopically expressed KSR1 or KSR1F701A proteins in human tumour cells known to express the KRASG12C oncoprotein including MIA PaCa‐2 cells as well as two cell lines derived from PDX established from lung tumours, PDX‐dc1 and PDX‐dc1 [29]. Here, KSR1 is linked to neoplasm.