Health Dictionary
Reliable, easy-to-read patient information on common medical conditions — written in plain language, free of jargon, and grounded in current evidence. Browse the most frequent diagnoses, understand what they mean for everyday life, and learn which steps and questions help you have a focused conversation with your doctor.
HLA-A23
Introduction
HLA-A23 (A23) is an HLA–A serotype. A23 is a split antigen serotype represented by the A9 broad antigen serotype. A closely related type is A24. A23 is common in Africa and regions of the Middle East, Mediterranean, and India. The mode for A23 is in western africa and two regions, Carmeroon and Senegal have frequencies approaching 20%. Outside of West Africa some increase is seen in small areas of India, most regions outside of africa A23 falls between 0 and 5%.
Serotype
Serotype
| A*23 | A23 | A24 | Sample |
| allele | % | % | size (N) |
| 2301 | 95 | 1 | 5119 |
| 2302 | >50 | 2 |
A23-B Haplotypes
A23-B Haplotypes
A23-B7 is found in N.Afr. and S.Afr non-caucasians.
A23-B44 is found in Albania, Zimbabwe, Morocco, Spain and Danes.
A23-B58 is found in the !kung and Zaire.
References
References
- ↑ derived from IMGT/HLA
- ↑ Tang J, Tang S, Lobashevsky E, Myracle A, Fideli U, Aldrovandi G, Allen S, Musonda R, Kaslow R (2002). “Favorable and unfavorable HLA class I alleles and haplotypes in Zambians predominantly infected with clade C human immunodeficiency virus type 1”. J Virol. 76 (16): 8276–84. PMID 12134033.