Table 1.

Relationship between mutation frequency and survival after EMS treatment.

EMS concentration (%)	Mutation frequency of canavanine resistant (×10−7)	Fold elevation*	Survival (%)
0.0	2	1	100
1.5	35	18	51
2.0	36	19	30
2.5	33	17	21
3.0	37	19	12

* Fold elevation is relative to untreated cells.