sera and plasma from mammals , reptiles , amphibia , and fishes are capable of cleaving fluid phase human c4b and c3b , generating apparently the same fragments as observed using normal human serum : alpha 2 , alpha 3 , alpha 4 from the alpha ' chain of c4b : and alpha-68 , alpha-46 , alpha-43 , and alpha-30 from the alpha ' chain of c3b .
C0032105
plasma
C0229671
serum