“…Cryoglobulin is a nucleic acid-protein complex (709). The complexes of streptokinase (125, 498) and of streptokinase and urokinase (1920) with plasminogen have been demonstrated, as have complexes of various enzymes with their inhibitors (1125, 1370), which include glutathione (284), dyes (24), and ribonucleic acid (947). The products of proteolytic enzyme action on lipovitellin (616), alpha2-macroglobulin (1004), gamma-G globulins (1990), serum proteins (1000,1013,1514, 2140), myeloma proteins (1781), and hemoglobin (49) have been investigated.…”