A-B) FC analysis of NK1.1+ ILCs and their expression of CCR10 in adult (A) and day0-3 old neonatal (B) DL4-WT (DL4f/f CCR10+/EGFP), DL4-KO (Foxn1CreDL4f/f CCR10+/EGFP) and Rag1−/−CCR10+/EGFP thymus. Average percentages and numbers of total CD3−NK1.1+ thymocytes and CCR10+NK1.1+ ILCs were shown in bar graphs. NK1.1+ ILC1s are gated from CD3−CD4−CD8− thymocytes. One dot represents one mouse. Results are of four independent experiments. ns = not significant, *p < 0.05, **p < 0.01, ***p < 0.001, ****p < 0.0001 as determined by two-tailed Student’s t test.