Cis and Trans-Class ll Dimerization DQA1 DOB1 Maternal 0501 0201 cis 做 DQA1*0501/DQB1*0201 0301 0302 CIS Paternal trans DQA1*0301/DQB1*0302 黛 打滋 DQA1*0301/DQB1*0201 DQA1*0501/DQB1*0302 BDC 0501 0201 0301 0302 cis cis DQA1 DQB1 trans DQA1*0301/DQB1*0201 DQA1*0501/DQB1*0302 DQA1*0501/DQB1*0201 DQA1*0301/DQB1*0302 Maternal Paternal Cis and Trans- Class II Dimerization BDC