Severinov K. et al. 1993
Severinov K., Soushko M., Goldfarb A., Nikiforov V. 1993. Rifampicin region revisited. New rifampicin-resistant and streptolydigin-resistant mutants in the beta subunit of Escherichia coli RNA polymerase. J Biol Chem 268: 14820-14825.