Interchangeability of delta subunits of RNA polymerase from different species of the genus Bacillus

Abstract

RNA polymerase was purified from 5 species of Bacillus, including Bacillus subtilis. Each polymerase had a subunit composition analogous to that reported for B. subtilis, i.e., ββ'2ασδω1ω2. The delta subunits from the B subtilis and Bacillus thuringiensis polymerases were interchangeable, as judged from their effects on promoter selection in the polymerase binding assay.