ScienceDaily: Biotechnology News |
- Bacteria may readily swap beneficial genes: Microbes trade genetic coding for antibiotic resistance and more
- Growing without cell division: Mechanism responsible for cell polyploidy pinpointed?
- Key element of cell division: How daughter cells receive the same number of chromosomes
- Live-action films of worm sperm help researchers track critical fertility enzymes
- Genetic difference in staph infects some heart devices, not others
| Posted: 01 Nov 2011 09:59 AM PDT Researchers say they've found evidence of a massive network of recent gene exchange connecting bacteria from around the world: 10,000 unique genes flowing via horizontal gene transfer among 2,235 bacterial genomes. Much as people can exchange information instantaneously in the digital age, bacteria associated with humans and their livestock appear to freely and rapidly exchange genetic material related to human disease and antibiotic resistance through a mechanism called horizontal gene transfer (HGT).  |
| Growing without cell division: Mechanism responsible for cell polyploidy pinpointed? Posted: 01 Nov 2011 09:59 AM PDT Biologists may have pinpointed for the first time the mechanism responsible for cell polyploidy, a state in which cells contain more than two paired sets of chromosomes.  |
| Key element of cell division: How daughter cells receive the same number of chromosomes Posted: 01 Nov 2011 09:59 AM PDT Scientists have uncovered the molecular process of how cells are bypassing the body's inbuilt "health checkpoint" with unequal numbers of chromosomes that have a higher risk of developing cancer.  |
| Live-action films of worm sperm help researchers track critical fertility enzymes Posted: 01 Nov 2011 09:55 AM PDT Compared to most other cells in an organism, sperm undergo a radical transformation to become compact and mobile delivery systems for paternal DNA. Even though sperm looks and moves quite differently across species, researchers now say that there are at least a few key enzymes that are critical for sperm development and mobility in species as different as mice and nematode worms.  |
| Genetic difference in staph infects some heart devices, not others Posted: 24 Oct 2011 12:34 PM PDT Infectious films of Staph bacteria around an implanted cardiac device, such as a pacemaker, often force a second surgery to replace the device at a cost of up to $100,000. But not all implanted cardiac devices become infected. Now researchers have discovered how and why certain strains of staphylococcus aureus (SA) bacteria, the leading cause of these device infections, have infected thousands of implanted cardiac devices. About 4 percent of the one million annually implanted devices become infected.  |
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