What is the Function of Protein a in the Cell

Question

What is the function of protein A in the cell wall of Staphylococcus aureus?
A) To keep the structural integrity of the cell wall and keep out antimicrobial agents
B) To bind IgG and prevent phagocytosis
C) To bind IgM and inactivate natural killer cells
D) To block the activation of the complement cascade

Accepted Answer

Protein A in the cell wall of Staphylococcus aureus functions to bind IgG antibodies and prevent phagocytosis, allowing the bacterium to evade immune defenses.