Sentence examples for modern human contamination from inspiring English sources

However, new stringent methodologies have been employed that have reduced the modern human contamination that plagued previous studies to very low levels, and more than four billion nucleotides of Neanderthal DNA have now been sequenced and analyzed (Green et al. 2010).

We also observed that the number of Illumina GA reads mapping to the human genome, possibly indicating modern human contamination, is low.

While this may be due to modern human contamination, and thus provide an upper estimate of any such contamination, it may equally reflect the incomplete status of the bovine genome sequence [38].

Authentication of DNA sequences in prehistoric human remains has proved complicated, mainly because modern human contamination is always present to some degree [ 19- 21].

The most direct approach to detect modern human contamination would be to identify autosomal sequence positions in which all Neandertals differ from all or almost all current humans.

Early results from human remains collected in hot climate regions, such as Egypt [ 2] and Florida [ 86], are now considered as probably coming from modern human contaminations.

The initial sample preparation and DNA extraction were done in a clean room, using several procedures to reduce the chances of modern human DNA contamination.

The low level of modern human mtDNA contamination and the fact that from both specimens ancestral Y chromosomal positions could be repeatedly retrieved suggest that the majority of the ABO fragments amplified in this study derive from Neandertal nuclear DNA.

We have analysed two male Neandertals that were retrieved under controlled conditions at the El Sidron site in Asturias Spainn) and that appeared to be almost free of modern human DNA contamination.

Several papers have reported that, despite the use of rigorous protocols [ 10, 88], modern human DNA contamination is prevalent in amplification products from DNA extracts of ancient specimens [ 13, 88- 91].

They have applied the classical multiplexing approach, to characterize two SNP in the FOXP2 gene and to check a number of modern human DNA contamination control positions on autosomes, sex chromosomes and mtDNA.