Conditions that yield a repressive outcome when pivot is Carbon and target is GS2: GLN_Y and Starvation_Y GLU_Y and NH4_Y GLU_Y and NO3_Y The following may give a strong repressive effect: Illumination_Y Starvation_Y Organ_L Time_S Media_T NH4_Y NO3_Y GLU_Y GLN_Y Experiments to clarify border between repressive and not Illumination_Y, Starvation_Y, Organ_L, Time_S, Media_T, NH4_Y, NO3_Y, GLU_N, GLN_Y Illumination_Y, Starvation_Y, Organ_L, Time_S, Media_T, NH4_Y, NO3_Y, GLU_Y, GLN_N =============================