Tag: "mutants" at biology news

Photosystem I -- An Intermediate Step -- May Not Be Necessary For Plants

...entists from Oak Ridge used artificially developed mutants of a green alga to find this new life process. "It is a very important discovery; I didn't believe any of this stuff when it was first reported. I thought it was impossible, but cooperation between the two labs showed it was possible," Owens said. O...

Plants Need Vitamin C, Too

...that are bad for the human immune system. "But our mutants lacking vitamin C had shriveled leaves. When grown in an ozone-contained environment, those plants, the ones with shriveled leaves, were not able to cope with environmental stress." Their study, "Environmental stress sensitivity of an ascorbic acid-...

Newly Discovered Human Protein Provides Important Target For Cancer Therapy

...genetic ployusing yeast. They created novel yeast mutants with specific defects in theirability to replicate telomeres. Shortly thereafter, both the Whiteheadresearchers and a team led by Drs. Joachim Lingner and Thomas Cech of theUniversity of Colorado, Boulder, and Dr. Victoria Lundblad of the Baylor Co...

MIT's Mini Respirator Breathes Life Into Mutant Mice

...t longer than the absolutelife expectancy of these mutants without ventilation. "Indeed, the mutants diedonly after being weaned from the ventilator," the researchers write. Dr. Poon has been w...

Getting At The Components Of Mechanotransduction: Genes Required For Vertebrate Sensory Hair Cell Function Identified

...gy in Tbingen/Germany, a new study on zebrafish mutants with problems in balance has lead to the identi...point of the work is the analysis of the zebrafish mutants at different levels of neurobiology, from behavior and anatomy to physiology. This was achieve...

CAK Activation Of Plant Cell Cycle: Scientists Find Another Piece In The Jigsaw Puzzle To Help Explain Why Plants Do Not Develop Cancer Spontaneously

... arabidopsis, a common weed, into budding yeast mutants that had a defect in genes responsible for the production of yeast CAKs. In this way they could complement the budding yeast mutations with arabidopsis genes and identify a plant CAK gene. Remarkably, the plant CAK ...

Inhibition Of A Novel Gene Involved In Phosphorylating Starch In TransgenicPotato Tubers Leads To The Repression Of Cold Induced Sweetening

...other than plants, in bacteria, or in mutants of different plant species lacking this enzyme. Even though many starch biosynthetic enzymes are known, it has never been possible to synthesize semi-crystalline glucans in vitro, nor has it been explained how the phosphate...

University Of Cincinnati Biologists Find Evidence For Unusual DNA Repair InArchaea

...n began his most recent work by using Sulfolobus mutants ingenetic recombination experiments. A common type...ther requires tryptophan in its diet.Finding these mutants was a chore, to say the least. "The amino acid mutations are hard to get. We checked roughly 15-tho...

Raymond Receives $113,000 NIH Grant To Support Cell Cycle Regulation Research

.... This line of research, stemming directly from mutants discovered in Raymond's 1997 winter study class, demonstrates the minimal boundaries that can exist between teaching and research at Williams. Raymond created her winter study class in research on molecular genetics in response to comments from stude...

Scientists Identify New Gene That Controls Sleep/Wake Cycle

...night and day, but theresearchers identified three mutants of double-time that alter this cycle. Thefirst p...n oscillations. The researchers found that, in the mutants lacking double-time protein, veryhigh levels of PER protein accumulate in the cytoplasm and these ...

Mechanism Discovered For Determining Early Vertebrate Body Plan: New Zebrafish Mutants Afford Deeper Look Into Embryonic Patterning

... the journalDevelopment described nearly 2,000 new mutants of zebrafish (Danio rerio), thenewest animal model...of Pennsylvania Medical Center have identified new mutants importantin the first steps that control the dorsoventral -- back to abdomen --arrangement of embryo...

Promiscuous Plants May Spread Genes To Weeds

...e if theyinherited the resistance gene from Crs1-1 mutants or from the transgenic plantscontaining the implanted Csr1-1 mutant gene. Bergelson found that twenty times as many resistant progeny receivedtheir resistance from the transgenic plants as from the mutant plants. "It is unclear why th...

Evidence Mounts Against Maintstream Dogma In Embryology, Could Shed New Light On Neurological Defects

...e the presence of the Sonic hedgehog signal. These mutants lack a gene called cyclops. According to the newpaper, cyclops has been found to encode another type ofintercellular signaling molecule that plays a key role in floor plate and brain development. Cyclops is expressed during gastrulation, long before ...

French Researchers Breed Flightless Ladybirds As Pest-Killers

...ethyl methyl sulphonate.They picked out individual mutants that couldn't fly and bred from them. "Wecarried o... who was a member of the team. Flightless mutants occur naturally in various ladybird species, but theytend to have deformed wings and are generally u...

Scientists Find First Protein In Central Nervous System Junctions

...esearchers also showed that the spasticity ofthese mutants really did result from a lack of inhibitory synapses in the spinalcord as well as from molybdenum cofactor deficiency. "We came to the remarkable conclusion that this protein is required formaking inhibitory synapses in the spinal cord and a...

Genetically Engineered Mice Exhibit Anxiety, Offering Insight Into Role Of Serotonin In Brain

...eir observation, their initial findingssuggest the mutants were more active than normal mice, an effect that is alsoproduced in mice by antidepressant drugs. The suggestion that anxious mice could also exhibit anti-depressant-likebehaviors is not surprising, said Tecott, as there is substantial evidence tha...

Researchers Identify Key Gene That Controls Emergence Of Salmonella

...new worksought to find the differences bycomparing mutants with the two forms of the Salmonella typhimurium strain. Usingantibiotic-resistantmarkers and a detection technique called SDS-polyacrylamine gel electrophoresis,they identified the RfaL genethat is required to produce O-antigen. U. of I. scientists ...

Nerve Cells On The Go

... were essential forthe growth cones to proceed. In mutants dubbed bypass, ISNb neurons miss theirexit, growing straight past the muscle instead of turning sharply toward it. When he cloned the genes underlying stop short and bypass, Van Vactorexpected the genes would operate in different contexts. Bu...

Finding Reveals Broader Role Of Telomerase Enzyme, Suggesting New Target For Extending Life Span Of Cell

...to the chromosomes' stability. We'll be looking at mutants in yeastand human cells to try to figure out this mechanism." The explanation could enable researchers to make the most of thestill-theoretical process of replenishing healthy cells via telomerasemanipulation. Traditional thinking suggested that it w...

Enzyme Required To Prolong Life In Worms Identified By Researchers At Columbia; Key Enzyme Appears To Protect Animal Cells From Oxidative Damage

...eded to make healthy, long-lived dauers, andin the mutants they are being inappropriately expressed to make adults livelonger." How could animals have acquired a gene that would have allowed them tolive longer? An evolutionary argument can be made that acquiring a gene toextend adult life after repr...

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