title: A human-specific subfamily of Alu sequences.
abstract: Of a total of 500,000 Alu family members, approximately 500 are present as a human-specific (HS) subfamily. Each of the HS subfamily members shares a high degree of nucleotide identity and is not present at orthologous positions in other primate genomes, suggesting that HS subfamily members have recently inserted within the human genome. This confirms the hypothesis that the majority of Alu family members are amplified copies of a "master" gene(s). This master gene appears to be amplifying at a rate much slower than that seen earlier in primate evolution. Some of the HS Alu subfamily members have amplified so recently that they are dimorphic in the human population, making them a potentially powerful tool for studies of human populations.
authors.affiliation: Department of Biochemistry and Molecular Biology, Louisiana State University Medical Center, New Orleans 70112.
authors.forename: M A
authors.initials: MA
authors.lastname: Batzer
authors.forename: P L
authors.initials: PL
authors.lastname: Deininger
mesh_terms: D000818:Animals; D001483:Base Sequence; D005075:Biological Evolution; D003001:Cloning, Molecular; D004251:DNA Transposable Elements; D004277:DNA, Single-Stranded; D005784:Gene Amplification; D015698:Genomic Library; D006367:HeLa Cells; D006801:Humans; D008969:Molecular Sequence Data; D016133:Polymerase Chain Reaction; D011110:Polymorphism, Genetic; D011323:Primates; D012091:Repetitive Sequences, Nucleic Acid; D016415:Sequence Alignment
chemical_list: D004251:DNA Transposable Elements; D004277:DNA, Single-Stranded