AbstractImmune responsiveness to porcine lactic dehydrogenase in rats is linked to the H‐1 histocompatibility locus. Within 15 strains, 4 low‐responding strains were found, which were all homozygous for H‐1a. All other strains, including heterozygous animals carrying the H‐1aallele, were high responders. One of the high‐responding strains possesses the same known H‐1 specificities as the low‐responding strains except three, which the low responders carr
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