Transplantable IgD Immunoglobulin-Secreting Tumors in Rat

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Abstract
The LOU/C/Wsl rat inbred strain presents a high incidence of spontaneous malignant ileocecal immunocytomas or monoclonal immunoglobulin-secreting tumors. Some tumors have been transplanted in histocompatible animals over years without any change in their secretion products. Among approximately 600 different monoclonal proteins we have studied so far, we recognized six showing properties different from those of rat IgM, IgA, IgE, or IgG classes, and characteristic of the IgD class.