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Tag: "differs" at biology news

Examination of internal 'wiring' of yeast, worm, and fly reveals conserved circuits

...n the planet, and more practically, how a pathogen differs from its human host, or a diseased cell differs from it healthy counterpart at the most informative level of detail." For centuries, systematic com...

Variation in women's X chromosomes may explain differences among individuals, between sexes

... found. The proportion of genes that remain active differs dramatically among regions of the X chromosome, th...ired to determine if the pattern of X inactivation differs across tissues or over time and whether there are characteristic patterns of inactivation in materna...

Breakthrough isolating embryo-quality stem cells from blood

...nd measure cells one by one. His optical stretcher differs from an existing tool known as optical tweezers in which the light is focused to a sharp point to grab hold of a cell. In contrast, the optical stretcher uses un-focused light. This allows laser beams strong enough to detect stretching to be used wit...

Researchers pioneer new gene therapy technique using natural repair process

...ly turned on a cancer gene. Dr. Porteus' strategy differs fundamentally from previous gene therapies because it essentially replicates the natural process, which is more accurate. This accuracy means that, in practice, the gene therapy only affects the mutant gene. Homologous recombination is a fairly rare...

Tamoxifen-like drug suggests new ways to selectively block estrogen

...to a pocket in the estrogen receptor in a way that differs slightly, but importantly, from how tamoxifen fits. The slight difference changes the shape of the receptor in ways that alter its effects on the numerous coregulatory proteins that interact with it. "We found a small, but significant, change in con...

Discovery of an American salamander where it shouldn't be: Korea

...d Wake and his colleagues have established that it differs significantly from all other lungless salamanders, which make up 70 percent of the known 535 salamander species in the world. Wake and his colleagues placed the species in a new genus of plethodontids, Karsenia. The animal's common name will be the K...

Researchers seek to discover what really happens when a virus enters the body

... response as the virus moves outward. Their method differs from conventional laboratory studies of viruses that generally involve infecting the entire dish at once. As the virus moves out from the center in its attempt to infect other healthy cells, Duca identifies and stains relevant markers from the viru...

Plankton can run, but can't hide from basking sharks

...authors say, and shows that shark diving behaviour differs predictably between deep waters and in shallow seas close to plankton-rich boundaries in water temperature. Although the mechanisms underlying this behaviour are unclear, the results indicate that the sharks are responding to changes in vertical mig...

New law for resolution allows unprecedented sharpness in fluorescence microscopy

...r subject to Abbe's formula, but to a new law that differs from Abbe's original formula in a crucial factor - a square root term [1,2]: In one of their latest publications [2], the Göttingen-based research team verifies this new law with their experiments. They show that even with conventional objectives an...

Forsyth scientists find three bacteria associated with oral cancer

...focuses on testing saliva for particular bacteria, differs from --and could complement-- another recently reported approach in which saliva would be monitored for evidence of altered genetic activity in oral tissues. Background The current paper, "The Salivary Microbiota as a Diagnostic Indicator of Oral Ca...

Color perception is not in the eye of the beholder: It's in the brain

...umber of color-sensitive cones in the human retina differs dramatically among people--by up to 40 times--yet people appear to perceive colors the same way. The findings, on the cover of this week's journal Neuroscience, strongly suggest that our perception of color is controlled much more by our brains than ...

Viagra's hidden help for wildlife

...s still prefer TCM treatments. Furthermore, Viagra differs from many other Western drugs, in that the effects are rapid and visible to the naked eye. "The fact is that prior to the commercial availability of Viagra in 1998, no product in any medical tradition had been proven to be an effective and non-intru...

'Perception' gene tracked humanity's evolution, scientists say

...ences are. "Only about 1 to 1.5 percent of our DNA differs from chimpanzees," Hahn said. "We found that in a stretch of DNA about 68 base pairs in length upstream of prodynorphin, 10 percent of the sequence was different between us and chimps." Hahn said this "evolutionary burst" is responsible for differe...

Image of myosin-actin interaction revealed in cover story of Molecular Cell

...s along the monkey bars in a playground. Myosin V differs from the other myosin family proteins in that it is able to sustain this processive motion, enduring many hydrolysis cycles. The other myosins grab on tightly to actin and release after one hydrolysis cycle. "This study required a different way of t...

New research examines genetics of successful aging

...erage, the prevalence of numerous serious diseases differs in men and women, and there are important differen...acity to reach old age with normal mental capacity differs somewhat for men and women." The results of the study also highlighted the detrimental effects of ...

Researchers develop new method to help find deadly malaria parasite's Achilles heel

... deadly malaria parasite has protein 'wiring' that differs markedly from the cellular circuitry of other high...r worldwide from malaria has protein "wiring" that differs markedly from the cellular circuitry of other higher organisms, a finding which could lead to the de...

Whole-genome study at Johns Hopkins reveals a new gene associated with abnormal heart rhythm

...etters, known as nucleotides. Each person's genome differs from the next person's by as many as 10 million nucleotides. The researchers looked for single nucleotide variations - known as single nucleotide polymorphisms, or SNPs for short - that track with having a long or short QT interval. Only one partic...

'Uniquely human' component of language found in gregarious birds

... which the complexity and detail of human language differs from non-human communication systems." "It may be more useful," they add, "to consider species differences as quantitative rather than qualitative distinctions in cognitive mechanisms." "The more closely we understand what non-human animals are cap...

Behavioral studies show UV contributes to marsupial color vision

...omacy, but that its version of trichromatic vision differs from that of primates in that it includes sensitivity to UV wavelengths. In addition to furthering our knowledge of how mammalian color vision functions, the findings provide an opportunity to re-examine theories on the evolution of this key sensory ...

Sea coral's trick helps scientists tag proteins

..."We still have no clear explanation for why Dendra differs from other Kaede-like fluorescent proteins." Sergey Lukyanov pointed out that the ultraviolet light required to activate many PAFPs can be toxic to cells, and can dramatically alter their biochemistry. Further, the equipment needed to generate ultra...

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