Fig. 2. Electron microscopic analysis of lad1-1 cells. Electron micrographs of representative wild-type cells (KGY246) (B) and lad1-1 mutant (KGY2030) cells (A and C) after shifting to 36°C. The arrows in B indicate areas in which the primary septum was degraded. The arrows in C indicate regions lacking cell wall. Bar, 0.9 µm (A,C); 1.0 µm (B).