Gene

atf1 mts1 sss1 gad7
Gene expression upon nitrogen starvation

Values plotted in the graph

0 1 2 3 4 5 6 7 8
-N+P 0.000 0.840 1.823 1.576 1.474 1.731 1.642 1.642 1.772
-N-P 0.000 1.873 2.448 2.046 1.950 2.217 2.277 2.311 2.202

-N+P: Nitrogen starved in the presence of P-factor
-N-P: Nitrogen starved in the absence of P-factor

Number of mRNA in a vegetative growing cell (estimated roughly)