Constitutive

The term "constitutive" might refer to:

In physics, a constitutive equation is a relation between two physical quantities.
In cell biology, a constitutively active protein is a protein whose activity is constant and active.
In ecology, a constitutive defense is one that is always active, as opposed to an inducible defense.
Constitutive theory of statehood
In genetics, constitutive refers to a gene product made all the time. Ie. In the absence of the activator or the repressor, RNA polymerase transcribes the gene constitutively.

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