Cellular structure of S.pyogenes/ group A BETA- hemolytic streptococci

Contains A-polyssacharide. which makes up 10%(relatively high) of its dry weight. it consist of polymer of L-rhamnose and N acetyl-D-glucosamine in a 2:1 ratio. Antigenic components: linked by phosphate containing bridges to peptidoglycan which consist of N-glutamin acid, L-lysine and D and L- alanine.