Pantry Sites Near You. Allenport Food Pantry â. Allenport Fire Hall, 1850 Main St., Allenport, Pa. 15412. Distribution: Third Wednesday of the month, 8:30 â 10 a.m. Avella Food Pantry â.
Human Leukocyte Antigen (HLA) B27 (subtypes B*2701-2759) is a class I surface antigen encoded by the B locus in the major histocompatibility complex (MHC) on chromosome 6 and presents antigenic peptides (derived from self and non-self antigens) to T cells.or example, while 90% of people with ankylosing spondylitis (AS) are HLA-B27 positive, only a fraction of people with HLA-B27 ever develop AS. Individuals who are HLA-B27 positive are more likely to experience early onset AS than HLA-B27 negative individuals.
An HLA-B27 test may be ordered when a person has acute or chronic pain and inflammation in the spine, neck, chest, eyes, and/or joints, and the doctor suspects the cause is an autoimmune disorder that is associated with the presence of HLA-B27.octors frequently use the HLA-B27 test result when they suspect ankylosing spondylitis but the disease is in an early stage and the vertebrae in the spine have not yet undergone the characteristic changes that would be seen on X-ray. ^ Back to top.