Fig. 3. sra-13 inhibits the RAS/MAPK pathway during olfaction. The chemotaxis indices were calculated as described in the Materials and Methods. An index of 0 indicates no attraction and 1 indicates maximal attraction. The error bars indicate the standard deviation of the mean observed in at least three independent trials. `with HS' in I,K indicates that young adult animals were heat shocked twice at 33°C for 30 minutes with a 3 hour interval and chemotaxis was assayed after a 4 hour recovery period. Alleles used: sra-13(zh13), let-60(n2021), lin-45(sy96), mek-2(n2678), let-60(n1046gf), gpa-2(pk16), gpa-3(pk35), gpa-5(pk376), gpa-7(pk610).

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