Different slices of the global energy landscape of the three-variable yeast cell cycle model.

<p>(A) The landscape on the <i>x</i>-<i>z</i> plane with <i>y</i> = 0 corresponds to the G1/S phase in the cell cycle process. (B) and (C) The landscapes on the <i>x</i>-<i>y</i> plane with <i>z</i> = 0.3 and <i>z</i> = 0.05. (D) The landscape on the <i>x</i>-<i>y</i> plane with <i>z</i> = 0 corresponds to the S phase and the early M phase transition. The “G1”, “S” and “early M” in bold refer to G1 phase, S phase and early M phase respectively.