Fig. 1. Growth phenotypes of ehs2-1 mutant cells. (A) Morphology of ehs2-1 mutant cells grown at different temperatures. Differential interference-contrast micrographs of S. pombe wild-type (PN22) and ehs2-1 (GI 1) grown in YES liquid medium at 28°C or 37°C for 6 hours in the presence or absence of 1.2 M sorbitol (S). (B) Proportion of viable cells of the ehs2-1 mutant grown at different temperatures for the times indicated (with or without 1.2 M sorbitol) and plated on rich medium at 28°C.