The Influence of Matching for SB on MLC Typing Is Significant but Marginal

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Abstract
To investigate the role of SB in MLC typing responses, reactions of lymphocytes from 23 DW3‐positive. HLA‐D‐heterozygous individuals against 9 Dw3 homozygous typing cells (HTCs) were evaluated. Significantly more clear typing reactions were observed in those combinations that were matched for SB us compared with those that were mismatched. Nevertheless, MLC responses towards HTCs that were HLA‐D/DR‐ and SB‐compatible could be very strong. An additional analysis of the influence of HLA‐B and the newly defined determinants LB–Q1 and LB–Q2 demonstrated that in combinations that were matched for these markers as well, stabilized relative responses could still he over 100%.