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Chapter 15 Lecture 5 (Complement System (Complement can be activated in…
Chapter 15 Lecture 5
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Alternative pathway
Activation occurs independently of antibodies with the cleavage of C3 into two fragments, C3a and C3b
Useful in the early stages of infection before adaptive immunity response has created antibodies needed to activate the classical pathway
Lectin pathway
Mannose sugar (can be found on surfaces of fungi, bacteria, and viruses) attach to activating molecules called lectins
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