Fig. 6. MTF-1 mutants are highly sensitive to copper chelators. The bar diagrams depict the percentage survival of mutant and wild-type embryos to adulthood. MTF-1^–/– mutant (allele MTF-1^140-1R) (A) or y w control flies (B) were allowed to deposit 150–300 eggs on food containing the indicated concentrations of chelator, and eclosing adults were counted. NF = normal food. Error bars represent standard deviations calculated from the number of flies in at least three different tubes.