Table 1.

Photoproduct yields for mutant sequences of d(GTATCATGAGGTGC). ODNs (50 μM) were irradiated at pH 4.8 for 2.5 h at 0°C. Mutations are underlined. Only photoproducts detected in greater than 3 % yield are reported

Name	Sequence	% T2[c,a]T7	% T2[c,s]T4	% T4[Dewar]C5
WT	GTATCATGAGGTGC	42	5	10
Mut1	GTGTCATGAGGTGC	5	4	6
Mut2	GTAACATGAGGTGC
Mut3	GTAGCATGAGGTGC
Mut4	GTATAATGAGGTGC
Mut5	GTATGATGAGGTGC
Mut6	GTATCGTGAGGTGC	30		16
Mut7	GTATCATAAGGTGC	4	6	6
Mut8	GTATCATGAGGT - -		7	17
Mut9	GTATCATGAG - - - -		9	30
Mut10	GTATCATG - - - - - -		13	7