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Activation of the complement system leads to cleavage of the C3 molecule into C3b and C3a fragments. The C3a fragment plays a major role in immunity by inducing chemotaxis of eosinophils and mast cells and stimulating the respiratory burst in leukocytes. Although this anaphylotoxin has been well studied in mammals, there is currently a lack of information about the structure and function of C3a anaphylotoxins...
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