Immunogenicity and immunosensitivity of a guinea pig B-cell leukemia subline lacking cell surface Ia antigens.

L2C is a transplantable B-cell leukemia of strain 2 guinea pigs. Transplantation protection experiments were performed with L2C sublines expressing or lacking cell surface antigens coded for by the I region of the major histocompatibility complex (Ia). A subline (BZ-L2C) that lacked cell surface Ia antigens was immunogenic but relatively resistant to immunological attack. The data suggest that rejection of this B-cell leukemia may be influenced by expression of cell surface Ia antigens.