We have tested the tumoricidal potency of enzyme immunotoxins constructed of antibodies conjugated to glucose oxidase and to lactoperoxidase. Murine plasmacytoma cells were targeted in vitro with the use of affinity-purified rabbit anti-plasmacytoma membrane antibodies (conjugated to glucose oxidase or lactoperoxidase) or rabbit serum raised against plasmacytoma microsome membranes followed by ...

In general, when hemoproteins are treated with acidified acetone, the protein is precipitated, while the heme remains in solution. Exceptions are cytochrome c, lactoperoxidase, and myeloperoxidase; the linkages between heme and protein in these instances being covalent. While the nature of the linkages in cytochrome c and lactoperoxidase have been characterized, that present in myeloperoxidase ...