recently , using 35s-methionine incorporation and immunoprecipitation techniques our laboratory has demonstrated the ability of tissue cells , i.e. , the human lung type ii pneumocyte ( a549 ) and human lung fibroblast ( wi-38 ) , to synthesize and secrete a variety of early and terminal complement components , as well as several regulatory proteins in vitro , i.e. , c1r , c1s , c4 , c3 , c5 , c6 , c7 , c8 , c9 , factor b , factor h , factor i , and c1s inactivator .
C0007634
the
C0016030
fibroblast