further study using gel filtration ( sephacryl s-300 ) and affinity chromatography ( protein a ) revealed that immunoglobulin m ( igm ; 20 micrograms/ml ) alone was responsible for the complement activation in the killing of p. hominis , but both iga ( 24 micrograms/ml ) and igg ( 180 micrograms/ml ) had no effect on complement-mediated lysis .
C0009528
complement activation
C0009498
complement