What do complement proteins bind to

What happens then?the complement's markers, with or without antibody, attracts certain white blood cells called phagocytes, and they destroy the invader.The pathway is triggered when the c3b protein directly binds a microbe.Specifically, the complement system causes the lysis (bursting) of foreign and infected cells, the phagocytosis (ingestion) of foreign particles and cell debris, and the inflammation of surrounding tissue.The alternate/natural/lecin pathway, and the classical/specific pathwayWhere do complement proteins bind on the antibody?

A complement blood test measures the amount or activity of complement proteins in the blood.The antibody system, in contrast, recognizes and locks on to specific foreign proteins on the outside of foreign cells, and, in many cases, activates complement.The complement system is a group of small proteins helps or complent the antibodies or phagocytic cells to clear the pathogens.It can also be triggered by some components of innate immunity.The complement protein involved in binding on the pathogen's surface is c3b.

The antibody binds to an antigen on the surface of a pathogen, activating the c1 complement protein.There are nine major complement proteins.