kd GFP kd IPTG_LacI kd LacI kd aTc_TetR kd TetR ko C1__pLac_RNAP ko C2__P0_RNAP ko_f RNAP C1__pLac ko_r C1__pLac_RNAP kr_f Kr nc 1 LacI nc C1__pLac kr_r C1__pLac_LacI ko_f RNAP C2__P0 ko_r C2__P0_RNAP kr_f Kr nc 1 TetR nc C2__P0 kr_r C2__P0_TetR kf_c IPTG nc__IPTG_IPTG_LacI LacI nc__LacI_IPTG_LacI kr_c IPTG_LacI kf_c TetR nc__TetR_aTc_TetR aTc nc__aTc_aTc_TetR kr_c aTc_TetR 2000 60 4000 0 6000 60 8000 0