An HLA‐D Specificity Found in the Japanese Population

A new HLA‐D specificity was found in the Japanese population in two different laboratories. Japanese cell YT, found at Stanford, California, was A9, BW22J, CW1 and cell Wa, found at Sapporo, Japan, was A9, BW22J homozygous. They were shown to be HLA‐D identical to the homozygous Japanese cell AH which was submitted to the VIth International Histocompatibility Testing Workshop (Workshop number 2‐001). This specificity was common in the Japanese (gf = 0.089) but completely absent from 62 Caucasians tested. Strong association of this specificity with HLA‐BW22J was demonstrated.