Table 1. Quantum yields ϕ (×10³) determined for the formation of dimeric photoproducts following irradiation at 255 nm.

	TCG 32	T5mCG 32	n-ss 50	m-ss 50	n-ds 50	m-ds 50
ϕ CPD (c,s)	0.5	0.7	1.3	1.3	0.6	1.1
ϕ 64	0.6	0.4	1.4	0.3	0.7	0.1

Abbreviations: CPD, cyclobutane pyrimidine dimer; 64, pyrimidine (6-4) pyrimidone adducts; ds, double strand; m, methylated; n, non-methylated; ss, single strand.