Multiple choice

The pyrogenic streptococcal exotoxins SPE, A, B, and C ________________.

  1. are M proteins

  2. cause post-streptococcal autoimmune disease

  3. produce high titers of anti-streptolysin O

  4. are superantigens

  5. have hyaluronidase activity
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The superantigens combine with the framework regions of certain TCR V beta families irrespective of their complementarity determining regions.

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