a, APA plot indicates that GATA3 binding is enriched in engineered GM12878 (A/A) cell specific chromatin loops. b, Distance distribution of chromatin loops specific to GM12878 (A/A), GM12878 (WT), or common in both cell lines. c, Enhancer-Promoter and Promoter-Promoter are more enriched in the differential loops of engineered GM12878 (A/A) cells. d-e, Virtual 4-C analysis (40kb resolution) shows A/A genotype-specific chromatin looping between the P2RY8 enhancer (pink bar) and the CRLF2 promoter (yellow bar) in engineered GM12878 (A/A) cells and ALL PDX samples with A/A genotype. Red bar indicates the P2RY8 super enhancer predicted by ROSE.