Fig. 1. Grx3 and Grx4 are required for survival upon treatment with hydrogen peroxide and t-butylhydroperoxide. Exponentially growing cells from wild-type, grx3, grx4 and grx3grx4 strains were harvested, serially diluted and spotted onto control SD plates or on SD plates containing 1 mM H2O2, 1 mM t-butylhidroperoxide or 0.75 mM diamide. Plates were incubated at 30°C for 3 days.