HLA-DQ9 (DQ9) is a human leukocyte antigen serotype within the HLA-DQ (DQ) serotype group. DQ8 is a split antigen of the DQ3 broad antigen. DQ8 is determined by the antibody recognition of β9 and this generally detects the gene product of DQB1*0303.
Read more about HLA-DQ9: Serology, DQB1*0303