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Tag: "ancient" at biology news

Dog genome sequenced

...t instead that they preferentially fracture within ancient 'hot spots.' These fragile 'hot spots' contain an unusual number of guanine and cytosine DNA bases and appear to suffer higher rates of mutation." SINEs of genetic diversity Another study appearing in the dog genome section of Genome Research...

Scientists fetch useful information from dog genome publications

...t instead that they preferentially fracture within ancient 'hot spots.' These fragile 'hot spots' contain an unusual number of guanine and cytosine DNA bases and appear to suffer higher rates of mutation." SINEs of genetic diversity Another study appearing in the dog genome section of Genome Research...

Ancient humans brought bottle gourds to the Americas from Asia

...aeology, the researchers assembled a collection of ancient remnants of bottle gourds from across the Americas...ified key genetic markers from the DNA of both the ancient gourds and their modern counterparts in Asia and Africa before comparing the plants' genetic make-up...

Researchers discover new form of cancer gene regulation

...formation of these RNA protein complexes is a very ancient form of regulation of protein function. Olga Lakiza, postdoctoral fellow in pediatrics at the Feinberg School, was the first author on the article. Iannaccone's other co-researchers on this study included David O. Walterhouse, associate professor o...

Microbes under Greenland Ice may be preview of what scientists find under Mars' surface

... atmospheres of both Earth and Mars. If a class of ancient microbes called Archaea are the source of Mars' methane, as some scientists have proposed, then unmanned probes to the Martian surface should look for them at depths where the temperature is about 10 degrees Celsius (18 degrees Fahrenheit) warmer tha...

Seal rookeries could provide a reliable food source for endangered California condors, study finds

...torical birds that lived from 1797 to 1965; and 10 ancient condors that died in the Rancho La Brea tar pits i...astodons, camels and bison." Isotopic analysis of ancient condor bones from the La Brea tar pits revealed that about 40 percent of Pleistocene birds fed prima...

Fossil find: 'Godzilla' crocodile had head of a dinosaur, fins like a fish

...site Researchers have discovered evidence of an ancient sea creature that would have made Tyrannosaurus re..., they found fossils of an entirely new species of ancient crocodile ?one whose massive jaws and jagged teeth would have made it the most fearsome predator in ...

Scientists sequence DNA of woolly mammoth

Experts in ancient DNA from McMaster University (Canada) have teamed ...hrough allows for the first time comparion of this ancient species with today's populations of African and Indian elephants, not just at the level of mitochond...

Fitting in: Newly evolved genes adopt a variety of strategies to remain in the gene pool

...,500 of which are considered to be duplicates. An ancient whole-genome duplication event is thought to be responsible for the formation of many of these duplicate copies. Sauer's group demonstrated that of the 105 families of duplicated gene families involved in yeast metabolism, 34 demonstrated back-up fu...

Novel protein complex enables survival in hostile environment

... have discovered a novel enzyme that represents an ancient detoxification system and provides a clue to the d...cal methanogenesis and sulfate reduction, two most ancient respiratory metabolisms, in a unique way," said Mukhopadhyay, whose lab studies organisms that produ...

Science's Breakthrough of the Year: Watching evolution in action

...f a short gamma ray burst -- a rapid merger of two ancient neutron stars or a neutron star and a black hole. Brain Wiring and Disease: Several studies in 2005 suggest that diseases such schizophrenia, Tourette syndrome, and dyslexia are rooted in "faulty wiring" of the brain's neural circuitry during devel...

Double trouble: Cells with duplicate genomes can trigger tumors

...s, including humans, are thought to have undergone ancient genome doublings. The therapeutic implications arise from biological differences between the tetraploid cells and normal cells that might make the tetraploid-derived cancerous cells vulnerable to doses of drugs that aren't harmful to the normal cel...

Ancient anthropoid origins discovered in Africa

...t lived 37 million years ago have been sifted from ancient sediments in the Egyptian desert, researchers have...iations in magnetic fields in the sediments due to ancient fluctuations in the earth's magnetic fields. According to Simons, other anthropoids exist at BQ-2 an...

Study Holds Promise For New Way To Fight HIV

...bit of science in itself. Now we can analyse these ancient DNA samples from the bones of a mammal that has been extinct for over 8000 years and show that they are directly related to a living deer ?more importantly we've found its closest living descendant." ...

CO2 sensing proves critical for fungal pathogens to adapt to life in air and human hosts

...tion in C. albicans; they also demonstrate that an ancient group of enzymes called adenylyl cyclases are the so-called chemosensors mediating both the CO2 -dependent filamentation in C. albicans and the capsule biosynthesis in C. neoformans. The authors go on to show that CO2 sensing in C. albicans is essent...

Extinct giant deer's descendant found in UK

...bit of science in itself. Now we can analyse these ancient DNA samples from the bones of a mammal that has been extinct for over 8000 years and show that they are directly related to a living deer ?more importantly we've found its closest living descendant." ...

Once-dreaded leprosy 'replaced' by tuberculosis, say researchers

...the examination of DNA from human remains from the ancient and medieval periods in Israel and Europe. In thes...investigators to re-examine DNA samples from other ancient sites that they and their colleagues had worked on previously. In doing so, they found leprosy and t...

The earliest animals had human-like genes

...our species has retained characteristics of a very ancient ancestor that have been lost in more quickly-evolving animals. This overturns a commonly-held view of the nature of genes in the first animals. The work appears in the current issue of the journal Science. Genes hold the recipes for proteins. The ge...

New antifreeze protein found in fleas may allow longer storage of transplant organs

...he possibility of harmful antibodies forming." An ancient species related to modern insects, snow fleas are also known as "springtails" because of the distinctive springing organ under their abdomen which allows them to leap hundreds of times their one-millimeter length. Dr. Graham first noticed them while ...

DNA traces evolution of extinct sabertooths and the American cheetah-like cat

By performing sequence analysis of ancient DNA, a team of researchers has obtained data that ...researchers created an updated family tree for the ancient cats by comparing ancient DNA extracted from the preserved bones of the two sabertooths (a Smilodon ...

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