Figure 1

A signaling pathway that controls yeast meiotic initiation. Proteins enclosed in an oval are model variables. Phosphorylated proteins are labeled with the letter P in a grey circle. Solid lines represent phosphorylation, dephosphorylation, or degradation; dashed lines indicate regulatory interactions between proteins. The arrow at the end of a dashed line depicts activation; the bar at the end of a dashed line shows repression.