Figure 2.

Mpk1 stimulates Cch1-Mid1 activity independently of other known targets. (A) ⁴⁵Ca²⁺ accumulation was measured in wild-type cells, bck1 mutants, mpk1 mutants, mck1 mutants, hsl1 mutants, and swe1 mutants as described in Figure 1B. (B) ⁴⁵Ca²⁺ accumulation in wild-type cells, mpk1 mutants, rlm1 mutants, swi4 mutants, swi6 mutants, and mih1 mutants was measured as in Figure 1B.