in the present study , we examined the interactions of c3b bound to pneumococcal capsules , to pneumococcal cell walls , and to the surface of sheep erythrocytes ( e ) with the serum control proteins , factor h ( beta 1h globulin ) ( h ) and factor i ( c3b/4b inactivator ) ( i ) , and with factor b ( b ) of the alternative c pathway .
C0056207
factor h
C0005157
beta