Gene

tub1 atb2 alp2 ban5
Gene expression upon nitrogen starvation

Values plotted in the graph

0 1 2 3 4 5 6 7 8
-N+P 0.000 -0.405 -0.246 -0.536 -0.607 -0.881 -1.151 -0.575 -0.732
-N-P 0.000 -0.290 -0.560 -0.595 -1.092 -1.677 -1.933 -2.085 -2.034

-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)