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Coelomic fluids of the two earthworm species E.foetida (E.F.) and L.terrestris (L.T.) have not only the ability to lyse various vertebrate erythrocytes but also to digest vertebrate serum proteins. Both activities are carried by different molecules since hemolysis but not proteolysis was inhibited by simple sugars. In contrary, proteolysis was blocked by PMSF which did not influence hemolysis. Coelomic fluids of E.F. digest effectively vertebrate serum proteins (PIgG, HSA) but not the proteins of L.T. coelomic fluids. The proteolytic activity was detected in approximately 40 000 mol. wt. fraction. After digestion proteolytic fragments were analyzed by immunoelectrophoresis, SDS-PAGE and TCA precipitation. Two of the fragments reacting with PIgG antisera remained intact even after 120 h digestion.
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