Table I. Yeast strains^a.

Yeast strain	Genotype	Reference
H1402	a leu2-3 leu2-112 ino1 ura3-52	Hannig et al. (1990)
H1149	a gcn2Δ leu2-3 leu2-112 ino1 ura3-52	Wek et al. (1990)
H2081	a gcn1Δ leu2-3 leu2-112 ino1 ura3-52	Marton et al. (1993)
H2563	a gcn20Δ leu2-3 leu2-112 ino1 ura3-52	C.Vazquez de Aldana and A.G.Hinnebusch,
		unpublished observations
H1894	a gcn2Δ leu2-3 leu2-112 ino1 ura3-52	Dever et al. (1993)
H2557	a gcn2Δ leu2-3 leu2-112 trp-Δ63 ura3-52 GAL2	Marton et al. (1993)
H2556	a gcn1Δ leu2-3 leu2-112 trp-Δ63 ura3-52 GAL2	Marton et al. (1993)
H2558	a gcn20Δ leu2-3 leu2-112 trp-Δ63 ura3-52 GAL2	Vazquez de Aldana et al. (1995)
H1511	a leu2-3 leu2-112 trp-Δ63 ura3-52 GAL2	Foiani et al. (1991)

^aThe first four strains are isogenic and were used in co-immunoprecipitation experiments together with H1894. The last four strains are isogenic and were used in pull-down assays, as well as in the genetic studies.