Table 4. Photophysical properties of single- and double-stranded DNA sequences containing pA.

NN a	Single strands				Double strands
	ε Abs b (M–1 cm–1)	λ Em (nm)	Φ F c (%)	εΦ F (M–1 cm–1)	ε Abs b (M–1 cm–1)	λ Em (nm)	Φ F c (%)	εΦ F (M–1 cm–1)
AA	14 500	407	58	8400	13 800	403	22	3000
AC	15 000	406	11	1700	14 300	402	6.2	890
AG	15 200	405	24	3600	13 200	403	16	2100
AT	15 000	407	15	2300	14 500	400	17	2500
CA	14 200	408	14	2000	12 600	405	9.9	1200
CC	14 500	407	3.6	520	12 900	406	4.3	560
CG	14 700	405	6.1	900	12 400	406	8.2	1000
CT	14 000	409	4.1	570	13 500	403	10	1400
GA	15 000	407	42	6300	14 000	404	14	2000
GC	16 000	404	4.4	700	14 700	405	3.4	500
GG	14 300	406	28	4000	13 200	405	13	1700
GT	15 200	407	8.3	1300	14 400	401	7.7	1100
TA	14 100	408	6.2	870	13 300	402	8.0	1100
TC	14 400	406	2.4	350	13 000	403	4.4	570
TG	14 500	408	3.3	480	12 600	404	6.7	840
TT	14 100	409	2.6	370	13 600	400	11	1500

^aSequences are named according to nucleotides surrounding pA; full sequences can be found in Table 3.

^bMolar absorptivity values are reported as an average of two or more experiments with a standard error of ≤200.

^cQuantum yields were determined for the emission profiles shown in Fig. S3, with quinine sulfate as reference (Φ_F = 54.6% in 0.5 M H₂SO₄), using an excitation wavelength of 353 nm, and are reported as an average of two or more experiments with a standard error of ≤0.8%.