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  • Title: Ia antigens in inbred rats and their relationship to the MLR phenotype.
    Author: Radka SF, Cramer DV, Gill TJ.
    Journal: J Immunol; 1977 Dec; 119(6):2037-44. PubMed ID: 144165.
    Abstract:
    Three different alloantisera were raised by using Ag-B/MLR disparate rats, and the cytotoxic activity remaining after absorption with erythrocytes to remove anti-Ag-B antibodies was examined. The alloantisera detected surface antigens present only on B cells and segregation studies demonstrated that the genes that code for these antigenic specificities were linked to the major histocompatibility complex. The reactivity of the alloantisera with splenic lymphocytes from a panel of strains representative of the currently known Ag-B groups showed that multiple specificities were present in two of the three antisera and that these specificities were shared by many inbred strains. The appropriate absorption studies showed, however, that each antiserum detected an unique specificity that was found only in those inbred strains that shared the same mixed lymphocyte reactivity (MLR) phenotype as the donor strain. The alloantiserum produced against the KGH strain inhibited the MLR reactions involving this strain only when it was used as the stimulating cell population. The antigens detected by the three alloantisera described here have the characteristics of Ia antigens, and they have tentatively been designated Ia.1 (ACI anti-KGH), Ia.3 (B3 anti-BN) and Ia.4 (MNR anti-DA).
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