Table 1.

Yeast strains used in this study

Name	Genotype	Source
SP1	MATa ura3 leu2 trp1 ade8 can1 his3	M. Wigler
NY782	MATa ura3-52 leu2-3,112 sec9-4	P. Novick
VL3	MATa his3 leu2 trp1 ade2 vsm1::URA3	J. Gerst
NY1217	MATa ura3-52 leu2-3,112 sec18-1	P. Novick
FHY102	MATa his3 leu2 ura3 sso1::kanMX4 sso2::kanMX4 pMM250 (SSO1-CEN-URA3)	F. Hughson