Table 1.
Characteristics of M5 mutant strains
| Property | wt M5 | ΔNH2 M5 | ΔA |
|---|---|---|---|
| Slide agglutination with: | |||
| Anti PepM5 | +++ | +++ | +++ |
| Anti SM5(1–15) | +++ | − | ++ |
| ELISA titer against streptococci: | |||
| Anti-pepM5 | 1:3200 | 1:6400 | 1:3200 |
| Anti-SM5(1–15) | 1:80000 | 1:400 | 1:40000 |
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