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. 2003 Jun;132(2):440–452. doi: 10.1104/pp.103.022780

Figure 3.

Figure 3.

Boolean circuits model ASN1, ASN2, and GLN2 regulation by light and carbon in etiolated seedlings. A through C, Boolean circuits based on 16 experiments represented in Table I. A, GLN2 regulation by WL, blue, red, or far-red light when compared against a base case of no light, no carbon, or no light, carbon (see “Materials and Methods”). B, ASN2 regulation by WL, blue, red, or far-red light when compared against a base-case of no light, no carbon, or no light, carbon. C, ASN1 regulation by WL, blue, red, or far-red light when compared against a base case of no light, no carbon, or no light, carbon. The inputs are WL, BLF, BHF, RLF, RHF, FRLF, or FRHF. Low fluence is 2 μE m–2 s–1; high fluence is 100 μE m–1 s–1. The arrow or barred lines indicate the function of the inputs as either inductive or repressive. Double arrows or double bars denote super-induction or super-repression, respectively. For a Boolean OR, if any one of the inputs is active, the output will also be active. Differences in the input for Boolean circuits when comparing “absence of carbon” to “presence of carbon” are shown by boxed inputs except for ASN2 where everything is different in the presence versus absence of carbon.