DR2 short antigen in Japanese. A strong association with Bw67 and TB23

A variant of the DR2 antigen, DR2 short (DR2S), was investigated in Japanese subjects by using a 9th International Histocompatibility Workshop reagent and locally-obtained alloantisera. A significant positive association between DR2S, Bw67 and TB23 was demonstrated. Haplotype analysis on four Japanese families showed that DR2S was segregated with the A11-Cw7-Bw67-DR2S-DQw1-TB23 haplotype.