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GENETIC ANALYSIS OF THE MIXED LYMPHOCYTE REACTION IN H‐1 SEROLOGICALLY IDENTICAL INBRED RATS

H‐1d and H‐11 serologically identical combinations of inbred rat strains were studied, in which there was a strong mixed lymphocyte reaction (MLR). The H‐1d identical combination was formed with the Maudsley reactive (MR) and BD IX strains, in which there was bidirectional stimulation. The LAD differences in the combination BD IX and MR were shown in experiments using back‐crosses derived from two different sources, BD IX x LEW and MR x LEW.