Table 1. High Ty1 copy strains have a slightly slower growth rate in rich medium than the zero Ty1 copy strain.

Strain (Ty1 copy number)	Trials	Doubling time in YPDa	Trials	Doubling time in YPD + 30 mM hydroxyureaa
Zero	6	3.8 ± 0.2	7	5.2 ± 0.3
Low	6	3.9 ± 0.2	6	5.0 ± 0.3
High	8	4.0 ± 0.2*	8	5.5 ± 0.4

Triplicate cultures were grown at 20° for each trial, and a total of four low Ty1 copy and four high Ty1 copy strains were tested. *P < 0.05 vs. zero Ty1 copy strain in same medium.

^aMean ± SD in hours.