TABLE 2.

DNA substrates used in ribonucleotide extension and excision experiments

Ribonucleotides in the indicated primer positions are noted in bold.

DNA	Sequence
R0	5′-CCTCTTCGCTATTACGCCAG-3′
	3′-GGAGAAGCGATAATGCGGTCGACCGCTTTCCCCCTACACGACGTT-5′
R1	5′-CCTCTTCGCTATTACGCCAG-3′
	3′-GGAGAAGCGATAATGCGGTCGACCGCTTTCCCCCTACACGACGTT-5′
R1(U)	5′-CCTCTTCGCTATTACGCCAU-3′
	3′-GGAGAAGCGATAATGCGGTAGACCGCTTTCCCCCTACACGACGTT-5′
R2	5′-CCTCTTCGCTATTACGCCAG-3′
	3′-GGAGAAGCGATAATGCGGTCGACCGCTTTCCCCCTACACGACGTT-5′
R3	5′-CCTCTTCGCTATTACGCCAG-3′
	3′-GGAGAAGCGATAATGCGGTCGACCGCTTTCCCCCTACACGACGTT-5′
R4	5′-CCTCTTCGCTATTACGCCAG-3′
	3′-GGAGAAGCGATAATGCGGTCGACCGCTTTCCCCCTACACGACGTT-5′
R5	5′-CCTCTTCGCTATTACGCCAG-3′
	3′-GGAGAAGCGATAATGCGGTCGACCGCTTTCCCCCTACACGACGTT-5′