si_0770 Streptococcal_Mga_Regulon Two-component system response regulator si_0770 Streptococcal_Mga_Regulon Two-component system histidine kinase si_0770 Streptococcal_Mga_Regulon Immunogenic secreted protein si_0770 Streptococcal_Mga_Regulon M protein trans-acting positive regulator (Mga) si_0770 Streptococcal_Mga_Regulon Mga-associated protein si_0770 Streptococcal_Mga_Regulon Hypothetical mga-associated protein si_0770 Streptococcal_Mga_Regulon Antiphagocytic M protein si_0770 Streptococcal_Mga_Regulon C5a peptidase (EC 3.4.21.-)