although the sequential fixation experiments have not allowed to establish directly the fixation of the following components of the complement system ( c2 and c3 ) , the positive results obtained using whole fresh normal human serum as a source of complement and a fluorescent anti-human c3 serum clearly indicate that the activation of the classical pathway by whole cells dna can go as far as the c3 step .
C0009498
complement
C0229671
serum