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.
A collaborative research project involving Professor Christopher Shaw of the Institute of Psychiatry, King's College London (KCL), Dr Tom Kwiatkowski at Massachusetts General Hospital (MGH) and Professor Robert H Brown at University of Massachusetts, has revealed that mutations in a gene called FUS (fused in sarcoma) cause familial Motor Neuron Disease (also known as Amyotrophic Lateral Sclerosis).
A paper published online today in Nature Neuroscience reveals the presence of methyl CpG binding protein 2 (MeCP2) in glia. MeCP2 is a protein associated with a variety of neurological disorders, including Rett Syndrome, the most physically disabling of the autism spectrum disorders.
An international team of researchers including scientists of Helmholtz Zentrum München has succeeded in identifying new gene variants associated with an increased risk for myocardial infarction (MI), or heart attack.
Unraveling the genetics of social behavior and cognitive abilities, researchers at the University of Utah and the Salk Institute for Biological Studies have traced the role of two genes,GTF2I and GTF2IRD, in a rare genetic disorder known as Williams Syndrome.
Scientists have long wondered how melanoma cells travel from primary tumors on the surface of the skin to the brain, liver and lungs, where they become more aggressive, resistant to therapy, and deadly.
It is estimated that three to six out of every 1,000 children in the United States have autism - and the number of diagnosed cases is rising.
It is estimated that three to six out of every 1,000 children in the United States have autism - and the number of diagnosed cases is rising.
Researchers have found evidence that a direct interaction between vitamin D and a common genetic variant alters the risk of developing multiple sclerosis (MS).
A comprehensive plan to help health care professionals diagnose and treat primary ovarian insufficiency-a menopause-like condition affecting girls and young women that may occur years before normal menopause is expected-has been developed by a scientist at the National Institutes of Health.
Researchers at the Johns Hopkins University School of Medicine are one gene closer to understanding schizophrenia and related disorders.
People with a genetic condition called Williams syndrome are famously gregarious. Scientists, looking carefully at brain function in individuals with Williams syndrome, think they may know why this is so.
Lenetix, Inc. today announced a significant step in the development of an improved first and second trimester non-invasive fetal chromosomal screening test to detect Down syndrome and other genetic fetal conditions.
Scientists at the MUHC and McGill University have identified a gene essential for the uptake of vitamin B12 in human cells.
In a research published in the advanced online publication of the scientific magazine Nature Genetics, researchers have identified a genetic defect for common epilepsies on chromosome 15.
In the Jan. 11 online edition of Nature Genetics, they report the results of their two-stage genome-wide association study of patients with Alzheimer's disease. The research showed that women who inherited two copies of a variant in the PCDH11X gene, found on the X chromosome, are at considerably greater risk of developing Alzheimer's disease.
An international team of scientists have identified a genetic risk factor for epilepsy which may lead to a better understanding of what causes the seizures and the development of new treatments for the condition.
An international consortium of researchers, including major contribution from a team led by Dr. John D. Rioux, a professor of medicine at the Université de Montréal and the Montreal Heart Institute, has identified genetic markers associated with risk for ulcerative colitis.
A pilot trial of an oral drug therapy called fenobam has shown promising initial results and could be a potential new treatment option for adult patients with Fragile X syndrome (FXS).
A team of researchers at Princeton University and The Cancer Institute of New Jersey has identified a long-sought gene that is fatefully switched on in 30 to 40 percent of all breast cancer patients, spreading the disease, resisting traditional chemotherapies and eventually leading to death.
A team of scientists has discovered a new syndrome associated with severe congenital neutropenia (SCN), a rare disorder in which children lack sufficient infection-fighting white cells, and identified the genetic cause of the syndrome: mutations in the gene Glucose-6-phosphatase, catalytic subunit 3 (G6PC3).
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