HLA Class I Histocompatibility Antigen, B-44 Alpha Chain

**Semantic type:** Amino Acid, Peptide, or Protein

**Definition:** HLA class I histocompatibility antigen, B-44 alpha chain (362 aa, ~40 kDa) is encoded by the human HLA-B gene. This protein plays a role in the presentation of foreign antigens to the immune system. Expression of this serotype may be associated with recurrent sinopulmonary infections and ankylosing spondylitis.

**Synonyms:** - Bw-44 - HLA Class I Histocompatibility Antigen, B*44 Alpha Chain - HLA-B44 - HLA-B44 Antigen - MHC Class I Antigen B*44