Table 3. Mutations found in UV-induced Ura⁺ revertants of the ura3-G764A strain and Can^r controls.

	Nucleotide change at positions 763–765 of the URA3 gene a	Additional mutations downstream of the presumed UV lesion
		Mutation type a	Distance from the lesion site (nt)	Chromosomal position b
Ura+ revertants(TLS at the site of ura3-G764A mutation)	GAC→GCC	A → T	- 635	116294
	GAC→GTC	G → A	- 23	116906
	GAC→AAC	G → A	+ 16	116946
	GAC→AAC	A → G	+ 34	116964
	GAC→AAC	A → G	+ 40	116970
	GAC→AAC	A ins	+ 177	117107
	GAC→AAC	C ins	+ 190	5i
	GAC→GGC	A ins	+ 262	77i
	GAC→AAT	T ins	+ 414	229i
	GAC→GGC	A → T	+ 631	446i
	GAC→CAC	A ins	+ 636	451i
	GAC→AAC	C → T	+ 772	587i
	GAC→GTT	G → A	+ 886	701i
	GAC→AAC	G → A	+ 968	783i
	GAC→GTC	G → A	+ 1654	1469i
	GAC→AAC	G → T	+ 2015	1830i
	GAC→GCC	C → T	+ 2155	1970i
Canr controls (no TLS at the site of ura3-G764A mutation)	NA	A → T	- 1774	115155
	NA	T → C	- 181	116748
	NA	C → T	+ 621	436i

^aNucleotide changes (bold) are shown for the coding DNA strand complementary to the strand containing the dipyrimidine sequence at positions 763–764.

^bNumbers with the “i” index indicate the position of the mutation in the inserted LEU2 gene fragment (see Fig. 3 for a more detailed explanation of the numbering system). Abbreviations are as in Table 1.