Antibodies and complement are protein molecules that are important in the immune system.

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Antibodies and complement are both protein molecules that play important roles in the immune system. Antibodies are produced by B cells and can specifically target and bind to foreign substances like viruses or bacteria. Complement refers to a group of proteins that can be activated when antibodies bind to a foreign substance, leading to a cascade of reactions that can help destroy the invader.

Antibodies and Complement Are Protein Molecules That Are Important in the Immune