Detection of a new non‐MHC alloantigenic system (SLD) in pigs

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Abstract
A new, non-MHC cell membrane leucocyte alloantigen was detected in pigs by the complement dependent lymphocytotoxic technique. The new leucocyte system was designated SLD. Its product antigen SLD-1 was demonstrated to segregate independently of the SLA, SLB, SLC, A and E antigens. Family studies supplied evidence of a dominant inheritance of SLD-1. Since an allelic antigen could not be demonstrated, only two alleles for this locus are reported, namly SLD1 and SLD-. No evidence of linkage was detected between the above mentioned leucocyte alloantigenic systems and SLD. The antigen was detected on enriched suspensions of T and B cells from peripheral blood, but it was not detected on erythrocytes, granulocytes and thrombocytes.

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