The signal transduction cascades regulating asexual sporulation in the Ascomycetous filamentous fungi A. nidulans (Aspergillus nidulans) can be divided into two phases: a Growth phase, in which cells become competent to respond to sporulation-inducing signals and an Asexual reproduction phase, including initiation of the Sporulation pathway and formation of spore-bearing structures. A. nidulans is homothallic (self-fertile). This fungus grows by forming an ordered network of filaments or hyphae that form a mycelium (Ref.1). The hyphae grow by apical extension and multiply by branching; giving rise to a radially symmetrical colony that expands at a constant rate. After a fixed period of time following vegetative growth, some hyphal cells within the center of the mycelium produce aerial branches that initiate asexual [...]