FIG. 4.

Abilities of strains MPRYB150 (pDG148; hatched bars), MPRYB149 (pDG148-mutS; black bars), MPRYB156 (pDG148-mutSL; open bars), and MPRYB148 (PDG148-mutL; checkered bars) to survive histidine (A), methionine (B), and leucine (C) starvation. Three plugs of bacteria-containing agar were taken from selection plates each day for testing of the viability of bacteria on the selecting medium (see Materials and Methods for details). The experiments were repeated at least twice. The results are representative.