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Tag: "contains" at biology news

Researchers discover way to make cells in the eye sensitive to light

...ng protein. The textbook view of theeye is that it contains only two light sensing systems, the rods andcones. However, over the last few years it has become increasinglyaccepted that we have a third system, which uses melanopsin, that haslain undetected during decades of vigorous scientific investigation."Pr...

Growth in the sea comes down to a struggle for iron

... discipline that is far removed from the sea. Soil contains lots of iron, but most of it stays locked up in minerals, as accessible to microorganisms as the gold in Fort Knox. Bacteria and fungi have learned to scavenge some of this iron by building a trap. They create molecules called siderophores that are a...

New binding target for oncogenic viral protein

...is thought to contribute to cancer. SV40 T antigen contains a motif that mimics the destruction signal found in these proteins." However, unlike the other substrates recognized by Fbw7, T antigen is not destroyed by the cell. Drs. Clurman and Welcker suspect that by acting as a decoy and binding to Fbw7, T a...

Cytoplasm affects the number of vertebrae in carp-goldfish clones

The March 2005 issue of Biology of Reproduction contains a report of some intriguing findings in cloned offspring created when nuclei from one genus of fish were transplanted to enucleated eggs of another genus of fish. The seven offspring, cloned from nuclei of common carp and egg cytoplasm of goldfish, ...

Found: Missing sequence of the human Y chromosome

...o researchers attempting to decodeits sequence. It contains an extraordinary abundance of repetitiveelements, ...tromeric region of the Y chromosome. This sequence contains a450-kilobase "euchromatic island" with eight presumably active genesflanked by repetitive satellite...

Yale Scientists Find MicroRNA Regulates Ras Cancer Gene

...ator of Ras expression. DNA of plants and animals contains sequences encoding microRNAs, important regulators of development, that control processes determining cell type and cell death. "The let-7 microRNA regulates Ras by binding to the message for Ras and likely inhibits translation of the Ras protein," ...

Needling Chromosomes Reveals Cell Division Secret

...the dividing cell so that each new "daughter" cell contains a singlecopy of each. The same basic process operates in normal cell division,called mitosis, as well as the proliferation of sperm and egg cellscalled meiosis."Chromosomes in mitosis and meiosis have to be held together, becauseotherwise they don’t ...

Purdue proves concept of using nano-materials for drug discovery

... of tiny vessels sitting on top of a material that contains numerous pores. This "nanoporous" material makes i...t the bottom with a material called alumina, which contains numerous pores measured in nanometers, or billionths of a meter. Researchers are working to duplica...

In the sea slug's defense against lobsters, confusion is key

...able, aversive chemicals, Aplysia's inky secretion contains large quantities of chemicals that are also found in the food of spiny lobsters and that indeed these chemicals serve to activate nervous-system pathways that control feeding behaviors of the lobster. The inky secretion also stimulates other behavior...

Protein Packages Found To Activate Genes; May Be What Regulates Development And Disease

... such as cancer. "Each type of cell in our bodies contains the same genes. What makes them do different thing...d the DNA sequences associated with chromatin that contains "on" tags. DNA is the same in all the cells in our body. What makes the cells do different jobs is t...

Scientists document complex genomic events leading to the birth of new genes

...m the neighboring GCC2 gene, whose protein product contains a GRIP domain that localizes intracellularly to the trans-Golgi network. The new gene family, spanning approximately 10% of human chromosome 2, was named RGP (for RanBP2-like, GRIP domain-containing proteins). By analyzing the gene order around the ...

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

... Database of Interacting Proteins. That repository contains the results of tens of thousands of laboratory measurements of physical interactions of proteins in more than 100 species. Ideker and his colleagues developed a computerized tool called PathBLAST to search through the Database of Interacting Proteins...

Sequencing of marine bacterium will help study of cell communication

...he fact that it is a symbiont, V. fischer's genome contains genes that may have toxin activity. "Analysis of this sequence has revealed surprising parallels with Vibrio cholerae and other pathogens," said Ann Stevens, associate professor of biology at Virginia Tech. This sequence research is described in the...

Ophthalmologists Use Artificial Silicon Retina Microchip To Treat Vision Loss

...ble to others." Surgical Information The ASR chip contains approximately 5,000 microscopic solar cells that convert light into electrical impulses. The purpose of the chip is to replace damaged photoreceptors, the "light-sensing" cells of the eye, which normally convert light into electrical signals within t...

Ophthalmologists implant five patients with artificial silicon retina microchip

...ble to others." Surgical Information The ASR chip contains approximately 5,000 microscopic solar cells that convert light into electrical impulses. The purpose of the chip is to replace damaged photoreceptors, the "light-sensing" cells of the eye, which normally convert light into electrical signals within t...

Cricket's finicky mating behavior boosts biodiversity

...final spermatophore, or capsule, to be transferred contains the actual sperm cells that impregnate the female. As a species begins to split into two separate species, says Mendelson, "the songs appear to be the first characteristic that changes." During the early part of the speciation process, says Mendels...

Dead zone area in Gulf could be increasing, researchers say

...xico and their findings show that the area's water contains lower oxygen levels than expected this time of year. That could mean the dead zone area could be more severe in 2005 and perhaps cover an even larger area than in previous years, says Steve DiMarco, associate professor in the Department of Oceanogra...

Stem Cell Research Shows Potential for Replacing Tissue Damaged in Heart Attacks

...s termed “cardiac embryoids.?Each cardiac embryoid contains a population of beating cardiac myocytes that is nearly homogeneous. “The results are significant because we were able to induce the cells to transform the way we wanted them to. It’s a major step in ES cell research, but there’s still a long way to...

Biodiversity hotspots identify conservation priorities

...r severe threat. Hotspots Revisited (CEMEX, 2004) contains the results of an in-depth reanalysis of global hotspots, a widely used prioritization strategy for allocating conservation dollars to areas where they can do the most good. "The biodiversity hotspots are the environmental emergency rooms of our pla...

A human parasite with a streamlined mitochondrion

...upport this process. Nevertheless, Entamoeba still contains a somewhat mysterious organelle, called a mitosome...s enigmatic organelle. They show that the mitosome contains a single type of a protein, called a mitochondrial carrier, that in human mitochondria exists in man...

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