How does our body protect itself from the large number and variety of pathogens around us? The immune system has many resources, one of them acts quickly and in a generic way. We call this mechanism the complement system.


Sources:
Abbas, A. K., Lichtman A.H., Shiv, P. (2010). Cellular and Molecular Immunology. 6th ed. Elsevier
Delves, P. J., Martin, S. J., Burton D. R., and Roitt I. M. (2014). Roitt Immunology Fundamentals. 12th ed. Pan American Medical
Law, S. K. A., and Dodds, A. W. (1997). The internal thioester and the covalent binding properties of the complement proteins C3 and C4. Protein Sci. 6, 263-274.


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Credits of the photos used for the introduction (CC BY):
Chalon Handmade (https://bit.ly/2KLN1zo); Matthis Volquardsen (https://bit.ly/31GSRc7); Trollbackco (https://bit.ly/2Mua6ZQ); Igorovsyannykov (https://bit.ly/33yBEDD).