in both cases the recipients were seronegative pretransplant by complement fixation ( less than 1:4 ) , neutralization ( less than 1:2 ) , and complement enhanced neutralization ( less than 1:4 ) , and by radioimmunoprecipitation of hsv-2 antigens with serum followed by polyacrylamide gel electrophoresis ( ripa-page ) .
C0009498
complement
C0229671
serum