(A) Expression of SOU1
as determined by Northern blot analysis with a SOU1
probe and with the following strains. Lanes: 1 and 2, parental strain
3153A (Sou−); 3, Sor52 (Sou+); 4, Sor53
(Sou+); 5, Sor52–1 (Sou−); and 6, Sor53–1
(Sou−). (B) Relative SOU1 mRNA
levels were estimated by comparing the hybridization signals with the
ethidium bromide fluorescence intensities of the rRNA bands.