Fig. 8: Enhanced Attachment of Bacteria to Phagocytes by the Opsonin C3b

When body defense pathways known as the complement pathways are activated, one of the beneficial defense proteins made is called C3b. One portion of C3b binds to bacterial surface proteins and another portion binds to C3b receptors such as CD-1 on phagocytes. The process of enhanced attachment is called opsonization.

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