Microbiology The exotoxin implicated in this patient’s disease is unusual in that it is a superantigen. This means which of the following? A It can bind to the inside surfaces of the normal peptide grooves of both lgA and the TCR molecule B It can bind to the inside surfaces of the normal peptide grooves of both lgE and the TCR molecule C It can bind to the inside surfaces of the normal peptide grooves of both the MHC class l molecule and the TCR molecule D It can bind to the outside surfaces of the normal peptide grooves of both the MHC class ll molecule and the TCR molecule 💡 Explanation The exotoxin implicated in this patient's disease is unusual in that it is a superantigen. This means which of the following? ✓ Correct Answer: D. It can bind to the outside surfaces of the normal peptide grooves of both the MHC class ll molecule and the TCR molecule