a. Alignment of CtIP and Sae2 arising from BLAST-searches with the CtIP C-terminus (790-897).
b-e, Deletion of the CtIP C-terminus impairs CtIP function. Three days after siRNA transfection, U2OS cells stably expressing GFP- tagged siRNA-resistant wild-type CtIP (WT) or a deletion mutant (1-789) were either treated with 1 μM CPT for 1 h and analyzed by immunoblotting or co-immunostaining, or were micro-irradiated and 30 min later co-immunostained as indicated. Asterisks in b and c: hyper-phosphorylated CtIP and RPA2.