Fig. 1.

Working hypothesis network describing the relationship between the expression of IME1 and IME2. Names of RNA molecules are in all capitals. In protein names, only the first letter is capitalized. Solid black arrows represent activation, and solid black lines with a knob represent repression. Solid gray lines with a knob reflect degradation. The dotted gray arrows (going from a node to an edge) represent gating by conjunction (AND). The node S represents the signal that induces entry into meiosis, in our case, nitrogen depletion in the presence of acetate as the sole carbon source.