(G) Fluorescence-activated cell sorting (FACS) plot of bulk syngeneic host brain following primary transplant (1T) of her4.1:EGFRvIII + her4.1:PI3KCAH1047R + her4.1:mScarlet + gfap:GFP brain tumor cells. The gene discussed is GFAP; the disease is brain neoplasm.