What do complement proteins do?%0D%0A%0D%0A%0D%0AThey cause fever.%0D%0A%0D%0A%0D%0AThey heal tissue.%0D%0A%0D%0A%0D%0AThey signal phagocytes.%0D%0A%0D%0A%0D%0AThey transport hormones.
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They signal phagocytes.