Next, tumor single cell suspensions were prepared from 3LL‐R tumors, grown in wildtype (WT) or MMR‐knock out (KO) C57BL/6 mice, and incubated with anti‐MMR Nb‐AF488 or with BCII10 Nb‐AF488 for 2 h at 4 °C (only surface staining, Figure4A,B) or at 37 °C (surface staining and cellular uptake, Figure 4C,D). This evidence concerns the gene MRC1 and neoplasm.