Data for publication: "A simple and unified protocol to purify all seven Escherichia coli RNA polymerase sigma factors."

Protein yields (purified sigma factors) obtained with the use of the protocol established in Kędzierska B, Stodolna A, Bryszkowska K, Dylewski M, Potrykus K. A simple and unified protocol to purify all seven Escherichia coli RNA polymerase sigma factors. J Appl Genet. 2024 May 6. doi: 10.1007/s13353-024-00870-3. and presented in Table 1 of this publication, were calculated based on the protein concentrations established with Qubit Protein Assay (Invitrogen; ThermoFisher Scientific cat. no. Q33212).Calculations: protein yield = [(protein concentration)x prep volume]/g wet weightThe initail culture volume, as well as OD600 of harvested cells are also provided in the accompanying file.