The protein A has the ability to bind antibodies (Option 3).
- Protein A is a surface protein which acts as a bacterial defense mechanism against the host immune system.
- This protein (protein A) was originally discovered within the cell wall of Staphylococcus aureus.
- Protein A binds the fragment crystallizable region (Fc region) of immunoglobulin G (IgG) antibodies.
- Streptokinase is a enzyme produced by Streptococci spp. in order to break up blood clots and thus spreads from the original site of infection.
- Coagulase is another bacterial enzyme that clots blood plasma by converting fibrinogen in plasma to fibrin.
- Hydrogen peroxide is an oxidizing agent which is used as an antimicrobial agent.
In conclusion, protein A has the ability to bind antibodies (IgG antibodies).
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