. 2004 Aug;24(16):7206–7213. doi: 10.1128/MCB.24.16.7206-7213.2004

TABLE 1.

Formation, stability, and dominance of USA⁺ colonies in strains with integrated URE2 variants

Integrated URE2	Plasmid^a	Mean no. of USA⁺ colonies/10⁶ cells^b ± SEM	USA⁺ stability^c	USA⁺ dominance^d
URE2-20	Vector, pH317	1.3 ± 0.2	19/44	14/19
	F.L., pER62	30 ± 6	12/22	11/12
	P.D., pER63	225 ± 65	8/22	5/8
URE2-21	Vector, pH317	67 ± 27	2/44	2/2
	F.L., pER95	220 ± 110	16/22	14/16
	P.D., pER98	1970 ± 640	20/22	18/20
URE2-22	Vector	8.2 ± 1.5	0/44	0/0
	F.L., pER112	21 ± 3	2/44	0/2
	P.D., pER99	360 ± 68	0/44	0/0
URE2-23	Vector	1.3 ± 0.8	1/44	0/1
	F.L., pER96	4.0 ± 2.0	1/22	1/1
	P.D., pER100	7.7 ± 0.3	2/22	2/2
URE2-24	Vector	2.7 ± 1.0	16/36	12/16
	F.L., pER113	60 ± 26	17/44	17/17
	P.D., pER101	68 ± 27	37/44	34/37
URE2-25	Vector	2.7 ± 0.9	12/26	8/12
	F.L., pER97	11 ± 2	2/22	2/2
	P.D., pER102	70s ± 40	2/22	2/2

All strains carry a LEU2 plasmid containing the GAL1 promoter (vector, pH317) or a version of pH317 modified to express either a full-length version of the Ure2p variant (F.L.) or the prion domain of the Ure2p variant (P.D.).

That is, the number of USA⁺ cells per 10⁶ cells after growth in galactose-raffinose dropout medium. Standard errors are indicated.

That is, the fraction of USA⁺ colonies that remained USA⁺ after 48 h of growth on YPAD.

That is, the fraction of stable USA⁺ colonies whose USA⁺ phenotype was dominant when mated with cells carrying the same URE2 variant and unable to utilize USA.