Table 1-. Sequences of the ODN used in this study.

F: tetrahydrofuran abasic site analog. Nat, S4 and S8 substrates are single strand DNA folded in a G-quadruplex. Poly dT-F is an unstructured DNA single strand. ds-F is the only duplex DNA sequence. All the ODN are labeled with IRDye 800 at the 5’ end.

ODN name	Sequences	Length of the product
Nat	5’-TAG GGT TAGG GTT AGG GTT AGG G-3’	-
S4	5’-TAG GGT TAFG GTT AGG GTT AGG G −3’	8 nt
S8	5’-TAG GGT TAGG GTT AGF GTT AGG G-3’	15 nt
Poly dT-F	5’-TTT TTT TTTT TTT TTF TTT TTT T-3’	15 nt
ds-F	5’-AAT TCA CCG GTA CCF TCT AGA ATT CG-3’ 3’-TTA AGT GGA CAT GGG AGA TCT TAA GC-5’	14 nt
Poly dT	5’-TTT TTT TTTT TTT TTT TTT TTT T-3’	-