| HLA-a1 antigen | <immunology> Human histocompatibility (HLA) surface antigen encoded by the a locus on chromosome 6. Individuals bearing this allele are more susceptible to hodgkin's disease. HLA-a1 is in linkage disequilibrium with HLA-b8 and HLA-dr3. (12 Dec 1998) |
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| HLA-a2 antigen | <immunology> Human histocompatibility (HLA) surface antigen encoded by the a locus on chromosome 6. The HLA-a2 antigen is associated with recognition of the influenza a virus. (12 Dec 1998) |
| HLA-a3 antigen | <immunology> Human histocompatibility (HLA) surface antigen encoded by the a locus on chromosome 6. The allele occurs with increased frequency in individuals with idiopathic haemochromatosis. HLA-a3 is in linkage disequilibrium with HLA-b7 and HLA-dr2. (12 Dec 1998) |
| HLA-b27 antigen | <immunology> Human histocompatibility (HLA) surface antigen encoded by the b locus on chromosome 6. It is strongly associated with acute anterior uveitis, ankylosing spondylitis, and reiter's disease. Increased frequency of antigen in: ankylosing spondylitis (90%), Reiter syndrome (90%), enteropathic arthritis (75%), psoriatic arthritis (60%) normal frequency: white: 8%, black: 4% (12 Dec 1998) |
| HLA-b35 antigen | <immunology> Human histocompatibility (HLA) surface antigen encoded by the b locus on chromosome 6. It is weakly associated with a number of diseases. (12 Dec 1998) |
| HLA-b7 antigen | <immunology> Human histocompatibility (HLA) surface antigen encoded by the b locus on chromosome 6. There is a weak association between the presence of the HLA-b7 antigen and the diseases of narcolepsy and idiopathic haemochromatosis. HLA-b7 is in linkage disequilibrium with HLA-a3 and HLA-dr2. (12 Dec 1998) |
| HLA-b8 antigen | <immunology> Human histocompatibility (HLA) surface antigen encoded by the b locus on chromosome 6. It is in linkage disequilibrium with HLA-a1 and HLA-dr3. This explains the fact that though HLA-b8 was originally associated with several diseases, including coeliac disease, dermatitis herpetiformis, and myasthenia gravis, their association with HLA-dr3 is now considered more significant. (12 Dec 1998) |
| HLA-dr1 antigen | <immunology> Human immune-response, d-related antigen encoded by the d locus on chromosome 6 and found on lymphoid cells. (12 Dec 1998) |
| HLA-dr2 antigen | <immunology> Human immune-response, d-related antigen encoded by the d locus on chromosome 6 and found on lymphoid cells. It is in linkage disequilibrium with HLA-a3 and HLA-b7 and is strongly associated with goodpasture syndrome, multiple sclerosis, and narcolepsy. (12 Dec 1998) |
| HLA-dr3 antigen | <immunology> Human immune-response, d-related antigen encoded by the d locus on chromosome 6 and found on lymphoid cells. It is in linkage disequilibrium with HLA-a1 and HLA-b8. The HLA-dr3 antigen is strongly associated with coeliac disease, grave's disease, dermatitis herpetiformis, early-age onset myasthenia gravis, systemic lupus erythematosus, juvenile diabetes, and opportunistic infections in aids. (12 Dec 1998) |
| HLA-dr4 antigen | <immunology> Human immune-response, d-related antigen encoded by the d locus on chromosome 6 and found on lymphoid cells. It is strongly associated with rheumatoid arthritis and juvenile diabetes. (12 Dec 1998) |
| HLA-dr5 antigen | <immunology> Human immune-response, d-related antigen encoded by the d-locus on chromosome 6 and found on lymphoid cells. It is associated with kaposi sarcoma in aids and juvenile rheumatoid arthritis. (12 Dec 1998) |
| HLA-dr6 antigen | <immunology> Human immune-response, d-related antigen encoded by the d locus on chromosome 6 and found on lymphoid cells. (12 Dec 1998) |
| HLA-dr7 antigen | <immunology> Human immune-response, d-related antigen encoded by the d locus on chromosome 6 and found on lymphoid cells. It is strongly associated with coeliac disease and psoriasis vulgaris. (12 Dec 1998) |
| homologous antigen | <immunology> A homologous antigen is one which will attract and react with a specific antibody. (09 Oct 1997) |