Choosing where to look and changing your mind
...echnique, Dr. Husain and his colleagues found that distinct areas within the medial frontal cortex were involved in these functions. One part of medial frontal cortex was active when people freely made a choice, whereas a different part responded to situations of conflict, i.e., when one plan had to be quickl...'Moss in space' project shows how some plants grow without gravity
... why moss grew non-randomly in space, but we found distinct spiral patterns," Sack said. He and his colleagues report their findings in the current online edition of the journal Planta. Common roof moss is a relatively primitive plant in which certain cells, called tip cells, are guided by gravity in their gr...Racial groupings match genetic profiles, Stanford study finds
...analyzed each of the four clusters, they found two distinct sub-groups within the East Asian genetic cluster. These two groups correlated with people who identified themselves as Chinese and Japanese. None of the other genetic groups could be broken down into smaller sub-sections. This suggests that there isn...New insight into regulation of blood stem cells
...of blood cell. Instead, c-Myb is critical for very distinct steps in the formation of specific types of blood ... a key regulator of hematopoiesis and acts at many distinct points to control HSCs. "It is remarkable that a single transcription factor controls the diverse pr......tein response sensor IRE1 alpha is required at two distinct steps in B cell lymphogenesis AUTHOR CONTACT: Randal J. Kaufman Howard Hughes Medical Institute, Ann Arbor, Michigan, USA. Phone: 734-763-9037; Fax: 734-763-9323; E-mail: kaufmanr@umich.edu This article is available at http://www.jci.org/cgi/cont...Biodiversity hotspots identify conservation priorities
...astern Afromontane regions have been identified as distinct hotspots in their own right. The scientists delved beyond species to identify genera and families that are unique to the hotspots, concluding that hotspots also hold a disproportionately high degree of unique evolutionary history. Madagascar and the...Finland tops environmental scorecard at World Economic Forum in Davos
...pollution stresses and consumption-related issues, distinct from those facing developing countries, where resource depletion and a lack of capacity for pollution control are dominant concerns. "Fundamentally, we see the ESI helping to make environmental decision-making more empirical and analytically rigorous...Cricket's finicky mating behavior boosts biodiversity
...rbreed. After a point, however, members of the two distinct species no longer mate with each other. This discovery led Mendelson to name one of her graduate-school papers after the pop song "Will You Still Love Me Tomorrow?" The Nature article was given the more conservative title of "Rapid Speciation in an A...Asthma gene clusters identified
...bilized with medication. The analysis revealed two distinct gene expression profiles in these groups of children, according to Gurjit K. Khurana Hershey, MD, PhD, director of the Center for Translational Research in Asthma and Allergy at Cincinnati Children's and senior author of the study. "We found that ch...Examination of internal 'wiring' of yeast, worm, and fly reveals conserved circuits
...ervation and overlap in yeast, worm, and fly in 71 distinct "network regions" that included such essential functions as protein degradation, RNA polyadenylation and splicing, protein phosphorylation and signal transduction, DNA synthesis, nuclear-cytoplasmic transport, and protein folding. Such networks enric...Hypertension in African Americans linked to two genomic regions
...ions," Rao says. "The admixture mapping method has distinct advantages over other more commonly used methods for population analysis," says C. Charles Gu, Ph.D., assistant professor of biostatistics and a co-author of the report. "We looked for genomic regions with an 'excess of ancestry' from one of the two ...New RNA polymerase discovered in plants
...A polymerases Pol I, II, and III perform the same distinct , though separate, functions in different species....laborators have indirect evidence that Pol IV is a distinct RNA polymerase, they still have many aspects of Pol IV to unravel. "We know what happens whe...JCI Table of Contents, March 1, 2005
...netic variation. The authors show that, in cells, distinct genetic variants of IL-13 differentially promote the mechanisms that lead to allergic inflammation. This is because the variants bind cellular proteins differently and have altered functions inside the cell. The work adds to our understanding of ho...Alcohol's effects on gene expression in the central nervous system
...ntal cortex, and ventral tegmental areas show that distinct biological pathways are associated with alcohol's action in specific brain regions and certain mouse strains. "We were able to use gene expression profiling to determine that alcohol produces multiple effects on different biological processes," sai...New technique may help detect fetal single gene disorders
...d not carry the same mutation were examined. Four distinct point mutations of the Beta-globin gene were examined. Presence or absence of the paternal mutant allele (gene) was correctly determined in 81 percent to 100 percent of the cases with only one false-positive test. "Our study indicates that fetal ge...New DNA studies verify existence of three right whale species
...ific right whale has been confirmed as genetically distinct from both the North Atlantic and Southern right whale, a designation with important implications for conservation efforts. "In 2001, we compared mitochondrial DNA samples from individual whales from different ocean basins and found that the North Pa...New research questions basic tenet of neuron function
.... 17 issue of the journal Neuron suggests that two distinct types of synaptic vesicles are responsible for the...hysiological techniques, the researchers found two distinct types of vesicles. "The functional differences of these two sets of vesicles may be the result of d...Map of human genetic variation across populations may promise improved disease treatments
...le data, won't resolve ongoing debate over whether distinct races of people exist, explained Cox, corresponding author of the study, with lead author David A. Hinds, also of Perlegen Sciences. "Our study was really designed to help us understand patterns of variation that are common and cut across populations......arge ocean pens have genetic traits that make them distinct from their wild counterparts. This has led critics of the fish farming industry to argue that farmed fish that break free a common occurrence might breed with native ones, perhaps compromising the health of the entire species and threatening its a...New findings lead researchers to question basic assumptions of fisheries management
... symposium includes new findings about genetically distinct populations within the geographic ranges of some marine fish species, as well as evidence that successful breeders may be few and far between in some populations. These and other findings further undermine fundamental assumptions of current fisheries...