Lynne A. McLandsborough and P.P. Cleary. "Insertional inactivation of virR in Streptococcus pyogenes M49 demonstrates that VirR functions as a positive regulator of streptococcal C5a peptidase and M protein in OF+ strains" IVth International ASM Conference on Streptococcal Genetics program and abstracts (1994)
Available at: http://works.bepress.com/lynne_mclandsborough/38/