Italian wolves haven't gone to the dogs--yet
...d with dogs, Randi and his colleagues compared the mitochondrial DNA of samples from 101 Italian wolves, 29 Bulgarian wolves, 20 wolves from other parts of Europe and 50 dogs (nine feral dogs from Italian wolf habitat, and 41 domestic dogs). The researchers found one DNA sequence that was unique to Italian wolves...The reproductive medicine revolution
...chniques are aiding IVF new findings on paternal mitochondrial DNA how a mouse might become a 'nursery' for human ovarian tissue good news for women who have problems conceiving a second child what is the 'gold standard' treatment in cases of unexplained infertility when should couples be refused IVF ...European Society of Human Reproduction & Embryology conference, Bologna, Italy, 25-28 June
...niques are aiding IVF. new findings on paternal mitochondrial DNA, how a mouse has become a 'nursery' for human ovarian tissue -- another world-first, good news for women who have problems conceiving a second child, what is the 'gold standard' treatment in cases of unexplained infertility, when sho...Where does Japan's whale meat come from?
...anese markets and restaurants. After analysing the mitochondrial DNA of 574 samples, the researchers conclude that nearly a third of the North Pacific minke whales on the market came from the J stock. They estimate that these unreported catches could tip the balance for the J stock, driving the number of mature fe...'Gatekeeper' protein is key to cellular life; links bacteria, chloroplasts and mitochondria
...be required for other proteins to migrate into the mitochondrial inner membrane. Without it, there is no migration and the mitochrondia cannot carry out vital cellular processes. A similar protein called Albino3 in the membranes of chloroplasts inside plant cells functions in apparently the same manner. Without it...No AIDS-related viruses or chimpanzee DNA found in 1950's-era polio vaccine
...bo tested for the presence and species origin of mitochondrial and nuclear DNA in the samples; and Dr. Wain-Hobson's laboratory performed both tests. Additional sets of samples, including control samples, were prepared and coded by the Centers for Disease Control, Atlanta, GA, and delivered to th...Tailoring mitochondria to the cell's needs
...osynthetic process is complicated, in part because mitochondrial composition varies between cell types. All cells depend on mitochondrial oxidative phosphorylation (OxPhos), but some--notably adult cardiac myocytes-- are specialized for m...... called vacuoles in the cell cytoplasm, along with mitochondrial swelling. Paraptotic cells are also resistant to agents that block apoptosis. Intriguingly, the characteristics of paraptosis have been observed in lower organisms that existed prior to the evolution of apoptosis, implying that paraptosis may actua...Genes reveal new clues about the first flower
..." dePamphilis says. "Several recent studies mixed mitochondrial gene sequences along with chloroplast and nuclear ...d by the similarity of their nuclear, plastid, and mitochondrial genes. The team's approach was to analyze separately the DNA from each of the three cellular compa...Human reproductive success tied to mitochondrial organization in eggs
... "Being able to determine the association between mitochondrial organization and egg competence non-invasively at an earlier stage would be a large step in predicting the eventual success or failure of the developing embryo," said Van Blerkom. If the microtubule arrays in the egg cell do not mirror each other at ...New fossil study rejects 'Eve theory'
...ecause different genes support different theories: mitochondrial genes support replacement theory while nuclear genes support the development of an older, worldwide species of human ancestors. "In asking the question a different way, and directly addressing the fossils, this study provides compelling evide...How wild horses were tamed by humans is uncovered by biologists from UCLA, Swedish universities
...horses, we should have seen a limited diversity in mitochondrial DNA sequences, which are inherited from the mother...lyzed DNA sequences from the control region of the mitochondrial genome a region with a high mutation rate....DNA deletion offers new evidence of mammals' origins
...nd 8600 base pairs." Two of the genes are found in mitochondrial DNA. The other four are found in the chromosomes of the nucleus, including BRCA-1, commonly known as the breast cancer gene. Springer, DeBry and the other co-authors report that a specific deletion of nine base pairs in BRCA-1 is shared by 12 groups...... modern human, Wolpoff argues, its ancient-looking mitochondrial DNA sequence could simply prove that we all once c...sity in Canberra and his colleagues. They analysed mitochondrial DNA from a 62,000-year-old fossil found near Lake Mungo in New South Wales. Mungo Man looks like a m...Laser treatment reduces scarring after heart attack
...essen the severity of a heart attack by increasing mitochondrial respiration and ATP, the major source for cellular energy production. The increase of both biological processes improves the cellular response to wounds, promoting healing and muscle regeneration after injury. Mitochondria are rod-like structures in...Study supports out-of-Africa origin for East Asians
...utionary information is available than is found in mitochondrial DNA." Mitochondrial DNA is non-nuclear genetic material passed from mothers to their children and has been used for some previous African origin research. Researchers from China, Indonesia, England and the U.S. collected samples, genotyped the Y ch...Indian caste groups have differing genetic relationships to Europeans and Asians
... other scientists analyzing either Y-chromosome or mitochondrial genetic data of Indian populations have often prod...by looking at the gender-specific Y-chromosome and mitochondrial genetic data. Bamshad's study showed that each caste's mitochondrial DNA, which derives from the mot...Genetic deficiency may explain sudden infant death syndrome
...cal Investigation. The missing enzyme is called mitochondrial trifunctional protein and it is a key step in prov...s in mice by "knocking out" the gene that produces mitochondrial trifunctional protein. The mice pups developed low blood sugar (neonatal hypoglycemia) and died sudd...Study of marine snail suggests conservation efforts should consider factors beyond genetic diversity
...tions of the snail by analyzing the variation in a mitochondrial DNA sequence from 117 individuals. The researchers then compared the sizes and shapes of the snails shells, which range from 15 to more than 30 millimeters in length, in each population with fossil shells of the same species found in coastal sediment......The study is the first ever to extract and analyze mitochondrial DNA from historic specimens. Previous studies by o...omparison purposes, the researchers also collected mitochondrial DNA from potato leaves infected with late blight in modern epidemics. Ristaino's co-authors on th...