Evidence for CSH1, a variant of Cw3, in an Oriental population

There have recently been a number of reports on Cw3 variants. By using 9th International Histocompatibility Workshop (9 IHW) sera to study 18 Chinese families, we were able to identify three distinct Cw3 patterns: Cw3.1, Cw3.2 and CSH1. CSH1 appears to be that component at the broad Cw3 determinant that is shared with the broad Cw1 determinant. With 9 IHW sera, we were able to distinguish between Cw1 and Cw3 traveling on the same haplotype from Cw1 and Cw3 traveling on different haplotypes.