Polymorphism of the mitochondrial DNA control region in Italians |
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Authors: | A Tagliabracci Chiara Turchi Loredana Buscemi Corrado Sassaroli |
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Institution: | (1) Istituto di Medicina Legale, Università di Ancona, Policlinico Torrette, 60020 Ancona, Italy e-mail: tagliabr@popcsi.unian.it; Fax: +39-071-5964723, IT |
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Abstract: | Mitochondrial DNA sequences of the hypervariable regions HVI and HVII were analysed in 83 Caucasians living in central Italy
to expand the database for forensic identification purposes, and 75 different haplotypes resulting from 62 polymorphic positions
in HVI and 44 in HVII were observed. The most frequent haplotype (263G, 309.1C, 315.1C) was shared by 7 individuals, 2 haplotypes
were shared by 2 individuals, and 72 were unique. The genetic diversity was found to be 0.99 and the random match probability
1.9%. A condition of sequence heteroplasmy was found in only one case at nt 16311, whereas a length heteroplasmy was found
in the homopolymeric stretch of cytosines 303–315. Our results indicate that in direct sequencing beyond the poly-cytosine
stretch, the overlap is due to length heteroplasmy, whereas the blurred signal occurs when the stretch is composed of more
than 10 cytosines.
Received: 14 February 2000 / Accepted: 23 May 2000 |
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Keywords: | Mitochondrial DNA PCR Sequencing Population frequencies Heteroplasmy Forensic identification |
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