Davis, J. H., Rubin, A. J. & Sauer, R. T. Design, construction and characterization of a set of insulated bacterial promoters. Nucleic Acids Res. 39, 1131–1141 (2011).

In this publication, a series of constitutive promoters are characterized, derived from the promoter pro D. Although the authors normalized the data to the activity of BBa_J23101, we took the liberty to re-normalize it BBa_J23100, also measured in the same study, for these numbers to be consistent with the caracterization of other constitutive promoters in the database.