with the use of the first component of guinea pig complement ( c ' 1 ) labeled in vivo with ( 14 ) c-amino acids , we have obtained evidence that , under the conditions required for the assay of c ' 1 , each molecule of c ' 1 capable of interaction with cell surface antigen-antibody complexes is capable of initiating the reaction sequence that leads to lysis of the cell .
C0699040
cell surface
C0007634
cell