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.
Human airways already demonstrate gender-based differences in DNA methylation signatures at birth, providing an early hint of which infants may be predisposed to develop respiratory disorders like asthma later in life, a research team reports in a paper published online April 3, 2018, in Scientific Reports.
New research coordinated by Karolinska Institutet in Sweden links certain DNA variants to increased risk of irritable bowel syndrome in women. The findings, published in the scientific journal Gastroenterology, might help explain why IBS is more common in women than in men.
The U.S. Food and Drug Administration granted accelerated approval to Blincyto (blinatumomab) to treat adults and children with B-cell precursor acute lymphoblastic leukemia (ALL) who are in remission but still have minimal residual disease (MRD).
EPFL biologists and geneticists have uncovered how the circadian clock orchestrates the 24-hour cycle of gene expression by regulating the structure of chromatin, the tightly wound DNA-protein complex of the cell. The work is published in Genes & Development.
A study conducted at The Wistar Institute in collaboration with The University of Texas Southwestern Medical Center has demonstrated the efficacy of targeting aberrantly active telomerase to treat therapy-resistant melanoma.
In a new study of one of the most common genetic causes of autism, neuroscientists at MIT's Picower Institute for Learning and Memory have identified a specific molecular mechanism that appears to undermine the ability of neurons in affected mice to properly incorporate changes driven by experience.
A new study has found certain genes that predispose a person to develop insomnia or sleep problems. This was one of the largest genome wide studies undertaken on insomnia. The study led by psychiatrist Murray Stein from the University of California San Diego was published in the latest issue of the journal Molecular Psychiatry.
Oxford Gene Technology, The Molecular Genetics Company, has launched a new version of its Cytocell fluorescence in situ hybridization probes website - designed to provide a wealth of information and advice, offer refined functionality, and be easy-to-use.
The accumulation of mutations in the human genome is at the origin of cancers, as well as the development of resistance to treatments. The Cyclin E and Myc genes are active in the control of cell division.
Can we stay young forever, or even recapture lost youth? Research from the laboratory of Professor Julian Chen in the School of Molecular Sciences at Arizona State University recently uncovered a crucial step in the telomerase enzyme catalytic cycle.
According to a team of researchers from the Roswell Park Cancer Institute, a new gene mutation could be responsible for ovarian cancers and this could be passed on from fathers to their daughters.
Little hints of immortality are lurking in the stem cells of fruit flies. Stem cells that produce sperm use a genetic trick to stay perpetually young across generations, researchers at the University of Michigan Life Sciences Institute have discovered. Certain sections of the fruit fly genome get shorter with age. But remarkably, some reproductive cells can repair the shrinkage, the researchers report in the journal eLife.
In 2015, University of California San Diego biologists Ethan Bier and Valentino Gantz developed a breakthrough technology known as "active genetics," which results in parents transmitting a genetic trait to most of their offspring (instead of 50 percent receiving the trait under standard inheritance).
DNA found in the mitochondria may play a more significant role in metastatic cancer than originally thought.
A study published in the February 2018 issue of the Journal of the American Academy of Child and Adolescent Psychiatry reports that five novel genetic variants associated with attention-deficit/hyperactivity disorder (ADHD) have been identified by exploiting genetic overlap between ADHD and educational attainment.
Researchers are closer to solving the puzzle of a complex neurological condition called 15q13.3 microdeletion syndrome. Individuals with this condition are missing a small piece of chromosome 15 that usually contains six genes, but which one of the genes is responsible for the clinical characteristics of patients has not been clear.
Japanese researchers report a new ion detector, MARIO. Using it, they show that changes in the intracellular concentration of free magnesium ions (Mg2+) is critical for the chromosome folding that must occur for cells to divide.
Idiopathic pulmonary fibrosis is a potentially lethal disease associated with the presence of critically short telomeres, currently lacking effective treatment.
Stem cell researchers at UConn Health have reversed Prader-Willi syndrome in brain cells growing in the lab, findings they recently published in the Human Molecular Genetics.
The difference between webbed toes and distinct digits may be the result of not just genetic information, but of how the genes regulate that information. Researchers at the National Institute of Genetics, Research Organization of Information and Systems in Japan found that a small, non-specific tweak to a mammal's DNA can potentially cause specific and significant physical changes.
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