Tag: "missing" at biology news

DNA deletion offers new evidence of mammals' origins

Cincinnati - What's missing might turn out to be as important as what's actually there in uncovering the roots of the mammalian tree of life. A team of biologists led by Mark Springer at the University of California, Riverside and including Ronald DeBry of the University of Ci...

UCSD biologist transform leaves into petals

...convert leaves into flower organs. We knew we were missing a piece of the puzzle and now we know exactly what we were missing." The team's discovery has important commercial as well as scientific implications. "It means that we should be able to convert leaves of essentially any plant into petals, whic...

Genetic map of all plants, animals is goal of genomics

...hat era were equally off target, with misshapen or missing continents and dire warnings about the dangers that existed in the unknown waters. A teacher in the third century A.D., Lactantius Firmianus, said: "Can there be a place on earth where things are upside down, where the trees grow downwards, and the r...

Scientists discover "missing link" between rare disease and inherited forms of breast cancer

...t switches on BRCA1. "FANCD2 turns out to be the missing link between the Fanconi anemia enzyme and the switching on of BRCA1," D'Andrea says. "When FANCD2 is activated, it serves as a 'zip code' that sends the FANCD2 protein to BRCA1. Once bound, the FANCD2 and BRCA1 proteins cooperate in DNA repair." ...

Gene for DiGeorge Syndrome discovered

...tom. Previously, the disorder had been linked to a missing portion of the human chromosome 22. In earlier research, the Baylor team reproduced the chromosome deletion, known as del22q11, in laboratory mice. The earlier research provided the basis for the current discovery. Baldini's team was able to identify...

Vitamin A activates gene to guide kidney development

...s lacking RARs were small and malformed; they were missing a special growth zone where new functional units, or nephrons, are added on to the growing kidney, and had a smaller than normal number of the structures that achieve the kidney's essential filtering function. They also had abnormally low levels of ...

Zebrafish could become genetics 'lab rat' of choice

...t test subject to see how they develop without the missing gene. Such experiments are called knockout experiments, because the gene is turned off, or knocked out. Over the past decade, plant scientists have used a small mustard plant, called Arabadopisis, to conduct gene knockout experiments in crops and pla...

Weizmann Institute scientists block loss of eyesight in animals with a glaucoma-like disease

...eing overlooked and they set out in search of this missing link. Approximately five years ago, Prof. Michal Schwartz of the Weizmann Institutes Neurobiology Department proposed a new concept to account for the continuing degeneration of the optic nerve that occurs after the pressure in the eye had been...

Insulin in worms

... Dr. Ruvkun and colleagues set out to identify the missing upstream component of insulin signaling in C. elegans: the insulin-like ligand that binds DAF-2. Dr. Ruvkun and colleagues used multiple tools to search the essentially complete worm genome for genes encoding members of the insulin family. Of the ...

UC Berkeley chemists detail secrets of ionization, reasons behind water's central role in chemistry of life

... Yet, the separation of a proton - a hydrogen atom missing its one electron - from a molecule is the essential first step in all acid/base chemical reactions. "If you're sitting on top of a water molecule, only one in a billion water molecules would exhibit this phenomenon of charge separation at a given in...

Florida scientists find enzyme replacement restores muscle strength in mice with Pompe's disease

...ed genetic disease in which an important enzyme is missing or defective, Byrne said. Enzyme replacement therapy to restore the missing enzyme is one of two current approaches currently being pursued to treat Pompe's disease. Byrne and ...

UCLA/Pitt researchers transform human fat into bone, muscle, cartilage

...dures for repairing and replacing damaged, dead or missing tissue in people. "Until now, we had not identified a good source of stem cells, which can be thought of as the building blocks of tissue engineering," said Dr. Marc Hedrick of the UCLA School of Medicine's Division of Plastic and Reconstructive Su...

Halfway human

...he had been smuggled out of Indonesia and had gone missing for 22 years before shop-owner Henry Galliano spot... But SM3 doesn't even have to be the long-awaited missing link to be troublesome. The finding that she fits so poorly into existing species categories seems t...

Researchers link failed cell division, Alzheimer's disease

Researchers have uncovered a key piece of missing evidence in the proof that nerve cell death in Alzheimer's disease is caused by a failed attempt at cell division. They have found a significant number of brain cells in Alzheimer's patients with extra copies of chromosomes, showing attempts at cell ...

New molecular key to disposal of dying cells

... cannot ingest them. "So the signal to ingest is missing due to the deletion of the receptor's cytoplasmic tail," Matsushima explained. "And because of this inability to quickly clear apoptotic cells, the cells eventually degenerate, releasing their internal components." The consequences can eventually pl...

Study supports out-of-Africa origin for East Asians

...indings are correct. The possibility of the study missing one case of admixture in one thousand subjects is so small the number is truly minute. Even if one investigated the likelihood of one Homo erectus admixture in a million individuals, the number remains far below that which validates the result....

Fragmentation linked to stress in birds

...gmentation -- even patches as big as 250 acres are missing many species -- but no one knows why. New research offers a clue: birds in fragments have slower-growing feathers. This suggests that they are more stressed, which could decrease survival and reproduction. "There might be physiological consequences ...

Genetic deficiency may explain sudden infant death syndrome

WINSTON-SALEM, N.C. - A missing enzyme may be one possible explanation for sudden ...e of The Journal of Clinical Investigation. The missing enzyme is called mitochondrial trifunctional protein and it is a key step in providing energy for sk...

Discovery of 'tidal giant'--a new Egyptian dinosaur--reported in Science

...ate Cretaceous, but these same groups appear to be missing from Africa. Some paleontologists think this pattern exists because the South American and Malagasy land masses were somehow connected at the time, to the exclusion of Africa. The Science researchers suggest, however, that this puzzling absence ...

Copper is crucial for embryonic deveopment, say U-M scientists

...ring technology to create knock-out mice that were missing one of two alleles - or copies of the Ctr1 gene --... mouse pups born, however, not one was found to be missing both copies of the gene. When Thiele examined mouse embryos from these crosses, he discovered that e...

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