to determine if aberrant interactions of the endogenous control proteins with cell-bound c3b contribute to the greater fixation of c3b to paroxysmal nocturnal hemoglobinuria ( pnh ) erythrocytes when whole serum complement is activated , we compared the characteristics of binding of factors b and h to normal and pnh red cells bearing c3b ( ec3b ) .
C0229671
serum
C0009498
complement