Controlled state of mRNA and protein levels in a noise-free case. (A) Controlled state of mRNAs of lacl, tetR, cl in the tri-gene regulatory in a noise-free case. The initial states of computer simulation start from initial status as [3, 2, 1]. (B) Controlled proteins cl, lacl, tetR in the tri-gene regulatory in a noise-free case. All states in (A) and (B) converge to 1.115 less than 20 second simulation time.