<Table> <Tr> <Td> </Td> <Td> It has been suggested that this article be merged with MACPF . (Discuss) Proposed since May 2016 . </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> It has been suggested that this article be merged with MACPF . (Discuss) Proposed since May 2016 . </Td> </Tr> <P> The membrane attack complex (MAC) or terminal complement complex (TCC) is a structure typically formed on the surface of pathogen cell membranes as a result of the activation of the host's complement system, and as such is one of the effector proteins of the immune system . The membrane - attack complex (MAC) forms transmembrane channels . These channels disrupt the cell membrane of target cells, leading to cell lysis and death . </P> <P> Active MAC is composed of the subunits C5b, C6, C7, C8 and several C9 molecules . </P>

Lysis of a pathogen by mac formation is an example of