(A) Deploying the AID system at Ctcf in mESCs.
(B) Western-blot showing reversible loss of CTCF in CTCF-AID cells
(C) Immunofluorescence staining
(D) Long-term survival (12 days) is only compromised in CTCF-AID cells treated with auxin after introduction of the Tir1 transgene
(E) Time-course flow-cytometry
(F) Brightfield images of mESC colonies after auxin treatment indicating cells tolerate a 2-day depletion with no adverse effects on viability. See
Figure S1