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Latest Model organisms Stories

2011-03-09 16:10:18

So-called model organisms have long been at the core of biomedical research, allowing scientists to study the ins and outs of human disorders in non-human subjects. In the ideal, such models accurately recapitulate a human disorder so that, for example, the Parkinson's disease observed in a rat model would be virtually indistinguishable from that in a human patient. The reality, of course, is that rats aren't human, and few models actually faithfully reflect the phenotype of the disease in...

2011-03-09 15:42:39

Hybrid plants with multiple genome copies show evidence of preferential treatment of the genes from one ancient parent over the genes of the other parent, even to the point where some of the unfavored genes eventually are deleted. Brian Dilkes, an assistant professor of genetics at Purdue University, worked with a team of scientists at the University of California Davis and University of Southern California to study the genome of Arabidopsis suecica, a hybrid species with four chromosome sets...

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2011-02-01 10:59:44

In a demonstration of "reverse-ecology," biologists at the University of California, Berkeley, have shown that one can determine an organism's adaptive traits by looking first at its genome and checking for variations across a population. The study, published the week of Jan. 31 in the journal Proceedings of the National Academy of Sciences, offers a powerful new tool in evolutionary genetics research, one that could be used to help monitor the effects of climate change and habitat...

2011-01-28 13:02:10

Plants are attacked by a multitude of insects and mammals. As defense against these herbivores they developed complex defense mechanisms over the course of evolution: spines, thorns, leaf hairs and a number of toxic chemical substances. For decades it has been controversially discussed whether the production of defense traits incurs costs to the plants. Now, using a new method the ecologists and plant biologists of the University of Zrich together with their American colleagues demonstrate...

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2011-01-13 10:18:55

Zoologists of the University Jena clarify the role of the gene FOXN3 for the development of the clawed frog "Don't be a frog!" people say in jest when someone hesitates instead of acting straight away. However to be called a frog should actually be a reason to strengthen one's self-confidence. After all frogs are real winners "“ at least from the point of view of evolutionary biology: Nearly 6.000 species are known today. "In terms of numbers frogs are superior to all the other...

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2010-11-19 10:25:33

By Daniel Stolte, University of Arizona A newly identified relationship between a fly and a weedy mustard-type plant promises to answer many long-standing questions surrounding the evolutionary arms race between plant-eating insects and their host plants Scientists trying to get a grip on the arms race between plant-eating insects and the defenses put up by their hosts just got a boost from new research by a University of Arizona entomologist published in the early view edition of Molecular...

2010-11-10 06:00:00

QUEBEC CITY, Nov. 10 /PRNewswire/ - Medicago USA Inc., a wholly owned subsidiary of Medicago Inc. (TSX: MDG) a biotechnology company focused on developing highly effective and competitive vaccines based on proprietary manufacturing technologies and Virus-Like Particles (VLPs), announced today that it has been awarded US$244,279 in funding under the Internal Revenue Service's Qualifying Therapeutic Discovery Project ("QTDP"). This program was created under the Patient Protection and...

2010-11-04 02:00:00

SAINT PAUL, Minn., Nov. 4, 2010 /PRNewswire/ -- Cellectis plant sciences, the plant genome engineering specialist and subsidiary of Cellectis (Alternext: ALCLS), announced today that it has signed a technology licensing agreement with Japan Tobacco Inc., a global supplier of tobacco, pharmaceuticals and food products, for access to its Agrobacterium transformation technology known as PureIntro®. The agreement provides Cellectis plant sciences with the ability to utilize...

2010-10-14 14:56:38

Proteins that import structural material and that regulate the import determine cell size Size matters when it comes to the nucleus of a cell, and now scientists have discovered the signals that control how big the nucleus gets. Nuclear size varies not only among different species, but also in different types of cells in the same species and at different times during development. In addition, cancer cells are known to develop larger nuclei as they become more malignant. Screening for cervical...

2010-10-01 08:00:00

- Appoints Vice President of U.S. Operations - RALEIGH, NC and QUEBEC CITY, Oct. 1 /PRNewswire-FirstCall/ - Medicago U.S.A. Inc., a wholly owned subsidiary of Medicago Inc. (TSX: MDG), a biotechnology company focused on developing highly effective and affordable vaccines based on proprietary manufacturing technologies and Virus-Like Particles (VLPs), today announced that company executives, along with U.S. Senator Kay Hagan (D-NC) and U.S. Congressman David Price (D-NC), are holding an...


Latest Model organisms Reference Libraries

Western Clawed Frog, Xenopus, tropicalis
2014-08-21 10:26:56

The western clawed frog is also known as the tropical clawed frog and is found widespread in the regions of Nigeria, Liberia, Gambia, Guinea, Cameroon, the Ivory coast, and surrounding areas. The habitat for the western clawed frog is moist areas in tropical and subtropical rivers, lakes, marshes, swamps, agricultural ponds, and canals. The body color of the western clawed frog is light to dark brown and covered with grey and black spots. The eyes protrude up from the head. Tubercles...

Fraser’s Clawed Frog, Xenopus fraseri
2014-08-21 10:15:53

The Fraser’s clawed frog also known as Fraser’s platanna is wide spread with an abundant population throughout Angola, Cameroon, Central African Republic, Republic of the Congo, Democratic Republic of the Congo, Equatorial Guinea, Gabon and Rwanda. The habitat of this species of frog is tropical and subtropical lowlands where there are forests, rivers, freshwater lakes, marshes, ponds and streams. The Fraser’s clawed frog is a water dependent species using it for living and...

African Clawed Frog, Xenopus laevis
2014-08-18 16:16:15

The African clawed frog is found in its natural habitat throughout Africa. However, it has been introduced in North America, South America and Europe. This species is fully aquatic and is found abundantly in ponds, lakes, and rivers. The body color of the African clawed frog is a greenish grey and the skin is smooth and slippery with blotches of grey or brown on the back. The belly is a cream colored with a yellow tint. The average length of this species is five inches. The body and head...

Auckland Island Pig
2014-08-07 11:44:58

The Auckland Island pig is a breed of feral pig that resides on Auckland Island in New Zealand. During the eighteenth and nineteenth centuries, domestic pigs were released onto many sub-Antarctic islands, including Auckland Island, by Europeans who wanted stranded sailors or whalers to have a steady supply of food when visiting these uninhabited islands. This process began in 1807 and after several other releases occurring between 1840 and the 1890’s, the pigs began to establish a healthy...

House Mouse, Mus musculus
2012-05-01 11:42:07

Even in the wild, this rodent is associated with humans by destroying crops and stored food. The house mouse is also known as the fancy mouse, a common pet. It is also a widely used laboratory animal, important for testing in genetics, biology, and medicine. There are three recognized subspecies of the house mouse. These mice thrive in a number of locations including fields, houses, and commercial structures. An adult male house mouse can have a body length of up to 3.9 in, and tail length...

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Word of the Day
lunula
  • A small crescent-shaped structure or marking, especially the white area at the base of a fingernail that resembles a half-moon.
This word is a diminutive of the Latin 'luna,' moon.
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