we sensitized gl trophozoites ( sgl ) at 4 degrees c with serum containing anti-gl antibodies or igm purified from this serum , and either normal human serum ( nhs ) , complement 2-deficient human serum ( c2d-hs ) , or c4-deficient guinea pig serum was used as source of complement .
C0009505
complement 2
C0009498
complement