Genetic interactions between foot mutants and elements of the mRNA-capping machinery. (A and B) Growth of the wild-type strain and foot mutants in combination with the ceg1-250 (A), abd1-5, or abd1-8 (B) mutation in YPD medium. (C) Growth of wild-type and mutant strains, transformed with an empty vector or overexpressing RPB6, in SD medium. (D) Growth of the wild-type strain and foot mutants, transformed with an empty vector or overexpressing CEG1, at 30°C in SD medium.