TABLE 2.

Conversion frequencies ofura4A mutations in one-point crosses

				Conversionsc
Mutation	Positiona	Sequence change	Cross typeb	6:2	2:6	Tetrads analyzed	Conversion (%)
13	562	C to A	II	24	13	208	17.8
1	634	A to G	I	13	24	213	17.4
5	709	G to T	I	6	20	214	12.1
6	793	G to C	I	10	7	200	8.5
14	823	C to A	I	8	16	217	11.1
9	934	G deletion	II	14	5	216	8.8
12	1001	G insertion	I	4	15	217	8.8
2	1043	G to A	I	8	8	211	7.6
4	1066	G to A	II	4	8	153	7.8
3	1104	C to T	I	15	12	220	12.3
11	1163	22-bp repeat	II	13	2	205	7.3
10	1167	C to T	I	2	10	204	5.9

^aNumbering according to Grimm et al. (1988). First base of start codon is 534; first base of stop codon is 1326.

^bCross type I is h⁻ ura4A⁻ × h⁺ ura4A⁺; cross type II is h⁻ ura4A⁺ × h⁺ ura4A⁻.

^cIn this tetrad run it was not possible to detect PMS. A conversion of 6:2 means three ura4A⁺ spore colonies (prototrophs) and one ura4A⁻ colony (auxotroph); 2:6 conversion tetrads have only one ura4A⁺ spore colony.