a, Genotype of distal site A edited Ahcyl1 clones shown in Fig. 2c. Predicted CTCF motif is highlighted in green. b, Left, CTCF ChIP-qPCR showing abrogation of CTCF binding at distal anchor A in clones distal site A rep1 and 2 shown in Fig. 2c (error bar: SEM; n = 2). Right, proximal CBS served as a control for ChIP efficiency (error bar: SEM; n = 2). c, Same as in (a) for Ahcyl1 distal site B. d, same as in (a) for Ahcyl1 distal site C. e, same as in (b) for Ahcyl1 distal site B and C. f, Genotype of distal site A and B edited Azi2 clones.