Fig. 2
From: A stochastic model of size control in the budding yeast cell cycle
Modified Cln3-Bck2 module for budding yeast cell cycle model. Solid arrows represent synthesis/degradation reactions and dashed arrows represent activation. The mCln3 and mBck2 are unregulated mRNAs constitutively transcribed. As cell grows in G1 phase, Cln3 and Bck2 proteins accumulate and the cell goes through the START transition, during which the cell commits to a new round of division. The START transition is identified by the activation of two important transcription factors (SBF and MBF), which are included in Other Modules and not presented here