(A) Schematic of a psoralen-ICL formed between two 2′-fluoroarabino-dT (FdT) nucleosides (inset).
(B) pICLPt, pICLPso, or pICLFdT-Pso was replicated in egg extracts in the presence of [α-32P]dATP. Repair intermediates were analyzed as in Figure 1C.
(C) pICLFdT-Pso was replicated in mock-depleted egg extract, FANCI-D2 depleted extract (ΔI-D2), or ΔI-D2 extract supplemented with xFANCI-D2 (ΔI-D2 + xI-D2) in the presence of [α-32P]dATP, and the repair intermediates were analyzed as in Figure 1C. White arrowhead, Figure 8 DNA structure that persists in the absence of FANCI-D2. The fraction Figure 8 indicates the proportion of Figure 8 structures relative to total species at 300 min.