What is anaphylatoxin?

Anaphylatoxin is a small peptide split from the third or fifth component of complement; it causes smooth muscle contraction and increased permeability of blood vessels.

Anaphylatoxins, or complement peptides, are fragments that are produced as part of the activation of the complement system. Complement components C3, C4 and C5 are large glycoproteins that have important functions in the immune response and host…

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