Out of 30 primary Apc1638N/+/KRASV12G tumours analysed by FACS, the average size (expressed in percentage of the bulk Lin− fraction) of each CD24/CD29 sorted subpopulation was determined: CD24−CD29−, 3.4% (SD 2.6); CD24−CD29+, 7.8% (SD 4.7); CD24+CD29−, 4.4% (SD 3.4); CD24loCD29+ (P1), 7.9% (SD 2.5); CD24medCD29+ (P2), 52.9% (SD 7.4); CD24hiCD29+ (P3), 10.0% (SD 4.7). The gene discussed is ITGB1; the disease is neoplasm.