ScienceDaily: Biotechnology News |
- Elusive Z- DNA found on nucleosomes
- Gene critical to sense of smell in fruit fly identified
- Unveiling malaria's 'cloak of invisibility'
| Elusive Z- DNA found on nucleosomes Posted: 20 Jan 2012 03:30 PM PST New research shows that left-handed Z-DNA, normally only found at sites where DNA is being copied, can also form on nucleosomes. The structure of DNA which provides the blueprint for life has famously been described as a double helix. To save space inside the nucleus, DNA is tightly wound around proteins to form nucleosomes which are then further wound and compacted into chromatin, which is further compacted into chromosomes. But this familiar image of a right handed coil (also called B-DNA) is not the only form of DNA. At sites where DNA is being copied into RNA (the messenger which is used as the instruction to make proteins) the DNA needs to unwind, and, in a process of negative supercoiling, can form a left-handed variety of the DNA double helix (Z-DNA).  |
| Gene critical to sense of smell in fruit fly identified Posted: 19 Jan 2012 10:04 PM PST Researchers have discovered that a gene called distal-less is critical to the fly's ability to receive, process and respond to smells.  |
| Unveiling malaria's 'cloak of invisibility' Posted: 18 Jan 2012 09:30 AM PST Scientists have discovered a molecule that is key to malaria's 'invisibility cloak.' The research will help to better understand how the parasite causes disease and escapes from the defenses mounted by the immune system.  |
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