Some Pathogenic Microorganisms Encode Proteins, Such as the Staphylococcus Protein

question 3

Multiple Choice

Some pathogenic microorganisms encode proteins, such as the Staphylococcus Protein A, that bind to immunoglobulin constant region domains with high affinity. These microbial proteins provide a benefit to the microorganism by:

• A) Preventing antibodies bound to the microbe from binding to Fc receptors on phagocytes
• B) Blocking the binding of anti-microbial antibodies to the pathogen surface
• C) Cleaving the antibody into fragments that separate the antigen-binding region from the effector function
• D) Inducing aggregation of the anti-microbial antibodies by multivalent binding to the pathogen-derived protein
• E) Preventing the antibody from neutralizing the pathogen

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