TABLE 2.

 Frequency of replication past a T-T cis-syn cyclobutane dimer in unirradiated and UV-irradiated cells

Strain	Relevant genotype	% TR (mean ± SD) past a T-T cis-syn dimer in:		No. of expts
		Unirradiated cells	UV-irradiated cells
TK603	umuDC+dnaQ+	2.9 ± 1.9	44.1 ± 3.1	3
RW82	ΔumuDC dnaQ+	1.0 ± 0.1a	2.4 ± 0.2a	15
DV12	umuDC+mutD5	5.5 ± 0.6a	51.9 ± 3.8a	4
DV05	ΔumuDC mutD5	17.7 ± 3.4a	25.5 ± 2.8a	7
DV13	ΔumuDC mutD5 lexA3(Ind−)	4.6 ± 0.3a	10.9 ± 0.6a	5
DV34	ΔumuDC mutD5 ΔpolA	26.5 ± 4.2	26.0 ± 2.9	3
DV10	ΔumuDC mutD5 ΔpolB	14.6 ± 2.6a	34.2 ± 5.4a	5
DV42	ΔumuDC mutD5 ΔdinB	27.6 ± 4.6	22.7 ± 2.6	6
DV36	ΔumuDC mutD5 ΔpolA ΔpolB	49.8 ± 5.7	52.0 ± 6.9	6
DV40	ΔumuDC mutD5 ΔpolA ΔdinB	28.9 ± 7.5	30.0 ± 5.2	3
DV30	ΔumuDC mutD5 ΔpolB ΔdinB	23.6 ± 1.6	24.3 ± 7.5	2
DV32	ΔumuDC mutD5 ΔpolA ΔpolB ΔdinB	44.2 ± 7.6	39.1 ± 2.8	2
DV38	ΔumuDC dnaQ+ ΔpolA ΔpolB ΔdinB	1.7 ± 0.1	0.2 ± 0.2	3

^aData from reference 36.