Humans normally have 46 chromosomes in each cell, divided into 23 pairs. Two copies of chromosome 9, one copy inherited from each parent, form one of the pairs. Chromosome 9 is made up of about 140 million DNA building blocks (base pairs) and represents approximately 4.5 percent of the total DNA in cells.
Identifying genes on each chromosome is an active area of genetic research. Because researchers use different approaches to predict the number of genes on each chromosome, the estimated number of genes varies. Chromosome 9 likely contains between 800 and 1,300 genes.
Genes on chromosome 9 are among the estimated 20,000 to 25,000 total genes in the human genome.
Researchers at the University of Michigan Comprehensive Cancer Center have identified a genetic anomaly that may drive the aggressive spread of a rare subset of prostate cancers.
Researchers at the University of Massachusetts Medical School have described a previously unknown role for the cilia protein IFT88 in mitosis, the process by which a dividing cell separates its chromosomes containing the cell's DNA into two identical sets of new daughter cells.
Vanderbilt University researchers have identified a new gene that can influence a person's risk for developing epilepsy. The findings, reported in the March 29 Proceedings of the National Academy of Sciences, could improve molecular diagnostic tools and point to novel therapeutic targets for epilepsy.
Results of a study presented at the AACR 102nd Annual Meeting 2011, held here April 2-6, lend credence to the idea that improving quality of life affects stress-related biological markers and possibly the health of people with cancer.
A common genetic variation links to both bladder cancer risk and to the length of protective caps found on the ends of chromosomes, scientists at The University of Texas MD Anderson Cancer Center reported today at the AACR 102nd Annual Meeting.
Speaking at the UK National Stem Cell Network conference in York later today, Professor Tessa Holyoake from the University of Glasgow will discuss a brand new approach to treating chronic myeloid leukaemia in which a small number of cancer cells persist despite effective therapy thus preventing cure.
In a study of 1,721 Korean male drinkers aged 40 y in an urban population-based cohort, and another sample of 1,113 male drinkers from an independent rural cohort, information on average daily alcohol consumption was collected and DNA samples were collected for genotyping.
Giving girls with Turner syndrome low doses of estrogen, as well as growth hormone, years before the onset of puberty, increases their height and offers a wealth of other benefits, say a team of researchers led by Thomas Jefferson University.
Heart transplant recipients and their physicians are likely more concerned with the function of the donated organ than with the donor's DNA sequences that tag along in the new, healthy tissue.
Johns Hopkins scientists, reporting in the journal Molecular Psychiatry, have identified a small region on chromosome 2 that is associated with increased risk for attempted suicide. This small region contains four genes, including the ACP1 gene, and the researchers found more than normal levels of the ACP1 protein in the brains of people who had committed suicide. This protein is thought to influence the same biological pathway as lithium, a medication known to reduce the rate of suicidal behavior.
Clinical studies of Resveratrol--recognized for its proven role in activating the longevity gene to inhibit age-related diseases--have shown that its antioxidant power provides resistance before and after exposure to hazardous radiation.
Looking at the dark stripes on the tiny zebrafish you might not expect that they hold a potentially important clue for discovering a treatment for the deadly skin disease melanoma. Yet melanocytes, the same cells that are are responsible for the pigmentation of zebrafish stripes and for human skin color, are also where melanoma originates.
A new UK study will provide better diagnoses for children with developmental disorders caused by changes in their genetic makeup. Scientists and clinicians will build a new national resource of genetic information and symptoms, based on data from 12,000 children who have a serious delay in their physical or mental development or are born with multiple malformations.
"Exceptional, Unconventional Research Enabling Knowledge Acceleration" - is the name of a rare and competitive grant that Reenan recently won from the National Institutes of Health. Beginning April 1, Reenan will use the four-year, $1.3-million award to look for genes that can suppress seizures in fruit flies that he has cleverly engineered to mimic human epilepsy.
Scientists at the European Molecular Biology Laboratory in Heidelberg, Germany, have developed a new method for studying gene regulation, by employing a jumping gene as an informant. Published online today in Nature Genetics, the new method is called GROMIT.
Primary care doctors are less likely to refer short girls than short boys for diagnostic testing that can reveal underlying medical reasons for their short stature, according to a new study of an urban pediatric population in Philadelphia. Girls with medical conditions causing their short stature may go undiagnosed, or may be diagnosed later than boys, limiting timely treatment.
If a big bunch of your brain cells suddenly went rogue and decided to become fat cells, it could cloud your decision-making capacity a bit. Fortunately, early in an organism's development, cells make firm and more-or-less permanent decisions about whether they will live their lives as, say, skin cells, brain cells or, well, fat cells.
Life Technologies Corporation today announced that it is the first life science tools provider entering clinical trials to prove the safety and effectiveness of their DNA sequence-based typing (SBT) platform for analysis of the Human Leukocyte Antigen (HLA) system. Submission for 510(k) clearance of this SBT platform will follow completion of the clinical trials, which is anticipated this summer.
RainDance Technologies, Inc., today announced the commercial availability of the ASDSeq™ and XSeq™ Research Screening Panels. Developed in collaboration with Emory University and Greenwood Genetic Center, the two comprehensive panels enable researchers to simultaneously interrogate key genes known to be linked to X-chromosome disorders and syndromic forms of Autism Spectrum Disorder (ASD) using next-generation sequencing.
Celera Corporation today reported net revenues of $34.9 million for the fourth quarter of 2010 that ended December 25, 2010, compared to $39.2 million for the prior year quarter.
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