MSaccelaration activity" or by binding protease factor I in "co-factor activity" to degrade C3b into inactive iC3b [7].Non-protected labelled surface, on the other hand, trigger the terminal pathway of complement activation, which is started by cleavage of C5 (a homologue of C3) into C5b and association with MAC-protein C6 into C5b6.C5b6 in turn binds other MAC proteins C7, C8 [8] and multiple C9s causing MAC formation and cell lysis.