FIG. 3.

Definition of elements D and E by deletion analysis of linker-scanning mutations. The structures and sporulation phenotypes of the indicated mei3 derivatives are shown as described in the legend to Fig. 1, except that linker-scanning mutations are defined by the regions that are mutated; e.g., ls13 substitutes 10 bp for nucleotides −92 to −83 inclusive. The locations of elements D, E, and C, which is defined primarily by insertion-scanning mutations (see Table 3), are also indicated.