Ancient DNA from Human and Animal
نویسندگان: ثبت نشده
چکیده مقاله:
Research on ancient DNA (aDNA) has the potential to enable molecular biologists and archeologists to decipher certain aspects of history by direct looking into the past. However, several major problems in this field limit the applicability of aDNA studies, most importantly contamination with modern DNA and postmortem DNA degradation. In this study we extracted and analyzed aDNA obtained from ~3500 year-old human and animal skeletal remains from two burial sites in north-western Iran. We attempted to determine the species of origin for the animal bones using general primers that allow amplification of mitochondrial DNA from almost all mammalian species. In addition, we designed the experiments in a way that allows monitoring the overall rate of potential contamination. In order to investigate the level of biomolecular preservation we employed HPLC (High Performance Liquid Chromatography) analyses to measure the extent of amino acid racemization. Despite the fact that amino acid preservation was low, we successfully extracted DNA from all samples. The data revealed that the level of contamination with human DNA was higher than the amount of DNA originating from other sources. Also, the frequency of DNA sequences from pig and horse was higher than other species. In general, while our data suggest that aDNA can provide valuable information on such ancient samples, the retrieval of aDNA is still a challenge due to both the problem of contamination with modern DNA and degradation of endogenous DNA.
منابع مشابه
ancient dna from human and animal
research on ancient dna (adna) has the potential to enable molecular biologists and archeologists to decipher certain aspects of history by direct looking into the past. however, several major problems in this field limit the applicability of adna studies, most importantly contamination with modern dna and postmortem dna degradation. in this study we extracted and analyzed adna obtained from ~3...
متن کاملAncient DNA and human history.
We review studies of genomic data obtained by sequencing hominin fossils with particular emphasis on the unique information that ancient DNA (aDNA) can provide about the demographic history of humans and our closest relatives. We concentrate on nuclear genomic sequences that have been published in the past few years. In many cases, particularly in the Arctic, the Americas, and Europe, aDNA has ...
متن کاملAncient mitochondrial DNA from hair
The DNA content of hair [1,2] is typically low compared to other tissues, as hair cells undergo dehydration and catabolic breakdown of nucleic acids and organelles during keratinisation [3]. As a consequence, ancient hair specimens have not been widely used as a source of ancient DNA. However, mitochondrial DNA (mtDNA) has been extracted from degraded and old hair samples, including burnt speci...
متن کاملGenetic analyses from ancient DNA.
About 20 years ago, DNA sequences were separately described from the quagga (a type of zebra) and an ancient Egyptian individual. What made these DNA sequences exceptional was that they were derived from 140- and 2400-year-old specimens. However, ancient DNA research, defined broadly as the retrieval of DNA sequences from museum specimens, archaeological finds, fossil remains, and other unusual...
متن کاملDNA damage and DNA sequence retrieval from ancient tissues.
Gas chromatography/mass spectrometry (GC/MS) was used to determine the amounts of eight oxidative base modifications in DNA extracted from 11 specimens of bones and soft tissues, ranging in age from 40 to >50 000 years. Among the compounds assayed hydantoin derivatives of pyrimidines were quantitatively dominant. From five of the specimens endogenous ancient DNA sequences could be amplified by ...
متن کاملمنابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ذخیره در منابع من قبلا به منابع من ذحیره شده{@ msg_add @}
عنوان ژورنال
دوره 19 شماره 1
صفحات -
تاریخ انتشار 2008-04-01
با دنبال کردن یک ژورنال هنگامی که شماره جدید این ژورنال منتشر می شود به شما از طریق ایمیل اطلاع داده می شود.
میزبانی شده توسط پلتفرم ابری doprax.com
copyright © 2015-2023