Promoters/Catalog/B. subtilis/Constitutive

All the promoters on this page are B. subtilis promoters that are constitutive meaning that the activity of these promoters should only be regulated by the levels of RNA polymerase and the appropriate σ factor.

Constitutive B. subtilis σ^A promoters

This section lists promoters that are recognized by B. subtilis σ^A RNAP. σ^A is the major B. subtilis sigma factor so there should be RNAP present to transcribe these promoters under most growth conditions (although maximally during exponential growth).

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Constitutive B. subtilis σ^B promoters

This section lists promoters that are recognized by B. subtilis σ^B RNAP. σ^B is the major stationary phase E. coli sigma factor. Use these promoters when you want high promoter activity during stationary phase or during starvation.

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