Signaling circuitry involved in the response of haploid cells to nutrient limitation. This study focused on the relative contributions of distal components in these pathways that have either positive (green) or negative (red) roles. Arrows, activation; T-bars, inhibition, inactivation, or repression. Line thickness indicates the strength of the observed effect: the thicker the line, the stronger the effect. The various effects depicted contribute in an additive (not all-or-none) fashion.