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Global Patterns of Linkage Disequilibrium at the CD4 Locus and Modern Human Origins

1996/03/08 by Sarah A. Tishkoff, E. Dietzsch, William C. Speed +12 · 11 citations
Biochemistry, Genetics and Molecular Biology · #Forensic and Genetic Research #Molecular Biology Techniques and Applications #Genetic Associations and Epidemiology

paper · doi:10.1126/science.271.5254.1380

openalex publication_date 1996/03/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01

Abstract

Haplotypes consisting of alleles at a short tandem repeat polymorphism (STRP) and an Alu deletion polymorphism at the CD4 locus on chromosome 12 were analyzed in more than 1600 individuals sampled from 42 geographically dispersed populations (13 African, 2 Middle Eastern, 7 European, 9 Asian, 3 Pacific, and 8 Amerindian). Sub-Saharan African populations had more haplotypes and exhibited more variability in frequencies of haplotypes than the Northeast African or non-African populations. The Alu deletion was nearly always associated with a single STRP allele in non-African and Northeast African populations but was associated with a wide range of STRP alleles in the sub-Saharan African populations. This global pattern of haplotype variation and linkage disequilibrium suggests a common and recent African origin for all non-African human populations.

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