Dna of Unknown Human Species found in Pacific Islanders

Theme:: Aborigines from Australia, Pacific Islanders are carrying DNA of unknown human species.

It was interesting and I could not help thinking of the descriptions of the Aborigines given by some in their Sasquatch meeting. Scientists believe that a third group, apart from the Neanderthals and Denisovans, can be found in the DNA of Pacific Islanders. "The DNA is probably not from Neanderthals or Denisovans, but from a third endangered homicide previously unknown to archeologists.

Ryan Bohlender and his research group studied the percentage of endangered hominide DNA in people. It should have used hominine instead of hominide when talking about Neanderthals and Denisovans.

Significant genome remains of endangered Denisovans found in Oceania.

Archean Denisovan and neanderthal DNA, which continues in contemporary specimens from the Pacific Isles of Melanesia, could be a resource of new information about early humanity, according to a review released this Thursday in the early release issue of Science. Joshua Akey, an underwater medical specialist in human genetic research, also believes that the DNA of endangered, human-like species has disappeared from the human gene pool and has been substituted by human-like DNAs.

The Denisovans are related to the Neanderthals, but different from them. It is a prehistorical species that has been found less than a century ago by means of a phalanx found in North Siberia. Denisovans, called after the cavern where this fossa and later two of our old brothers' tusks were found, became a new complement to our old co-ins on the evolving family.

Significant quantities of Denisovan DNA have so far only been found in the human genome of a few current population. "Benjamin Vernot, an underwater postdoc in the genome science who headed the research said: "I think that human beings (and Neanderthals and Denisovans) like to migrate. "Denisovans are the only species of ancient man we know less about fossile material and more of which their gene appears in contemporary man," Akey said.

The Denisovan DNA could account for between 2 and 4 per cent of the genomes of a local Melanesi. As other recent research suggests, lower denisovar lineage may be more common in the wider community. Svante Paabo from the Department of Evolutionary Genetics at the Max Planck Institute for Evolutionary Anthropology and Akey, Associate Director of Genomics at the University of Washington, supervised the Melanesic genomics group.

A lot of recent research has tried to comprehend when and where ancient hominids and our contemporary forebears coexisted and intermingled. The majority of this research was aimed at cataloguing Neanderthals genes that remain in the genome of individuals of European or Asiatic heredity. Vernot says that "different population groups have slightly different degrees of Neanderthals, which probably means that they meet Neanderthals again and again when they expand throughout Europe.

" It is questionable where the forefathers of the present man might have had bodily contacts with Denisovans. Akey said, the best suspicion is that Denisovans may have had a wide geographical reach that stretched as far as East Asia. People of Denisovan and Neo-Talic descent may have travelled through Southeast Asia.

Finally some of their offspring came to the northern isles. "There is little known about the organisation and properties of Denisovan DNA in human beings today, which is why we wanted to investigate genomic specimens from Melanesians," said Akey. "In their article, the researchers described an attempt to detect DNA that has been derived from several ancient hominid (human-like) progenitors and apply it to entire genomic sequence of 1,523 geographicly different people.

We analyzed the genera of 35 specimens from 11 sites in the Bismarck Archipelago on the North Island of Melanesia, Papua, New Guinea. Vernot said that with this trial, the scientists have promoted the comprehension of ancient DNA in human beings beyond a hominid species. Up to now, the scientists had localised large areas of the entire human kingdom in which no human being was carrying Neanderthals sequence.

"Now we know that some of these areas do not have Denisovan DNA either," he said. Vernote called these areas "archaic deserts", which reinforce the notion that something unique is human. Concerning the magnitude of those areas, it might mean that pick against ancient orders -- or other causes for genetic deprivation -- was tough, perhaps tougher than one might have expected, Vernot said.

The same areas of the human contemporary Genome contain several hundred different types of gene, many of which are related to speech, the human mind and its evolution and the signaling of cerebral tissues. "This is a big, really interesting region. It' going to be a long, difficult slogan to fully grasp the genetics of people, Denisovans and Neanderthals in these areas and the characteristics that affect them," Akey said.

In addition, the research group has also discovered neanderthals and Denisovans heritage that has benefited the forefathers of the contemporary island of Melanesia. There are five of these areas with immunofunctional enzymes that could be able to protect against newcomers. The research group has also devised new, rigorously applied techniques to label DNA archeological DNA sequence of Neanderthals, Denisovan or unknown ancestry.

"Classifying it is difficult and not a simple exercise," said Akey, "mislabeling could draw the wrong conclusion. According to Akey, this research will help to identify the impact of hybridisation with other species on the course of human development. "Several of the scenes that contemporary man received from Neanderthals and Denisovans help our forebears to live and reproduce," Akey said.

That kind of research gives prospect of human expansiveness across Eurasia and possibly what kind of circumstances those people met on their way, Vernot said. The work also noted that "shows how we can get to know the story of humanity and our old and contemporary relations by examining old and new DNA".