Table 1.

DNA used for crystallization and assays.

ID	Length (nt)	Sequence	Experiments
ssDNA	10	5′-CGGTCGATTC-3′	Crystallization, crosslinking assays, and ITC
ssDNA_THF	10	5′-CGGT(THF)GATTC-3′	Crystallization and ITC
ssDNA_dU	10	5′-CGGT(dU)GATTC-3′	Crystallization and crosslinking assays
ssDNA_polyA	11	5′-AAAAA(dU)AAAAA-3′	Crystallization
ssDNA2_dU	10	5′-GATTC(dU)GTCG-3′	Crystallization
3′ junction	31 + 15	5′-ATGACTCTTCTGGTC(THF)GGATGGTAGTTAAGT-3′	ITC
		5′-ACTTAACTACCATCC-3′
5′ junction	31 + 15	5′-ATGACTCTTCTGGTC(THF)GGATGGTAGTTAAGT-3′	ITC
		5′-GACCAGAAGAGTCAT-3′