Figure 1
From: Digital Signal Processing and Control for the Study of Gene Networks
(A) Digital signal processing and control. Analog or continuous experimental data measured are sampled or discretized at discrete time points (analog-digital conversion) and processed to generate digital control signals, which are transformed into analog signals through digital-to-analog conversion. (B) Simple two-gene network. First, xgene is transcribed into xmRNA, which is then translated into xprotein. In the presence of signal sx, xprotein transforms into its active form x*protein and binds to the promoter of ygene, transcribing ygene into ymRNA. As ymRNA is translated, yprotein is produced. The effect of yprotein production by xprotein can be counteracted by two processes that decrease yprotein concentration: degradation (protein destruction) and dilution (concentration reduction due to increased cell volume).
