FIG. 3.
(a) ELISA titration of rabbit antisera specific for GAS and GBS on a hexasaccharide-BSA (compound 4)-coated plate. OD 450 nm, optical density at 450 nm. (b) Inhibition of GAS-specific rabbit antiserum with GAS inhibitors on a hexasaccharide-BSA (compound 4)-coated plate. The numbers for the symbols indicate compounds shown in Fig. 1.