Navigation Links
Scientists narrow the time limits for the human and chimpanzee split

ed to establish how fast genes mutate in humans and to date the historical spread of our species around the globe." Kumar was assisted at Arizona State by Research Associate Alan Filipski and graduate student Vinod Swarna.

The scientists estimated the time of divergence between species by studying the sequential arrangement of nucleotides that make up the chain-like DNA molecules of each species. The number of mutations in the DNA sequence of a species, compared with other species, is a gauge of its rate of evolutionary change. By calibrating this rate with the known time of divergence of a species on another branch of the tree-like diagram that shows relationships among species, scientists can estimate the time when the species they are studying evolved. In this case, the calibration time the scientists used was the split of Old World monkeys -- including baboons, macaques, and others -- from the branch of the phylogenetic tree that led to humans and apes, which fossil studies have shown is at least 24 million years ago. Using this calibration time, the team estimated that the human-chimp divergence occurred at least 5 million years ago, proportionally about one-fifth of the calibration time.

This time is consistent with the findings of several research groups that have used the molecular-clock method to estimate the split of humans and chimpanzees since the first attempt in 1967. But this is only a minimum estimate, because it was based on a minimum calibration time. To obtain a maximum limit on the human-chimp divergence, the team used as a calibration point the maximum estimate, based on fossil studies, of the divergence of Old-World monkeys and the branch leading to humans -- 35 million years ago. Calculations using this date yielded a time for the human-chimp split of approximately 7 million years ago, which again was proportionally about one-fifth of the calibration time.

"We can conclude that humans and chimpanzees probably
'"/>

Source:Penn State


Page: 1 2 3

Related biology news :

1. Scientists ID molecular switch in liver that triggers harmful effects of saturated and trans fats
2. Scientists Replicate Hepatitis C Virus in Laboratory
3. Scientists detect probable genetic cause of some Parkinsons disease cases
4. Scientists find missing enzyme for tuberculosis iron scavenging pathway
5. Scientists seek answers on what activates deadly anthrax spores
6. Yale Scientists Find MicroRNA Regulates Ras Cancer Gene
7. Scientists collaborate to assess health of global environment
8. Scientists decipher genome of fungus that can cause life-threatening infections
9. Scientists discover the cellular roots of graying hair
10. Scientists rid stem cell culture of key animal cells
11. Scientists develop new color-coded test for protein folding
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Scientists narrow the time limits for the human and chimpanzee split

(Date:12/10/2014)... --Research and Markets ( http://www.researchandmarkets.com/research/xclcvw/biometrics_market ) ... Market in Japan 2014-2018" report to their ... The integration of biometrics and smart ... upgradation of the driver,s license is one of ... the aforementioned projects, biometrics is being used as ...
(Date:12/5/2014)... VIEW, Calif. , Dec. 4, 2014 /PRNewswire/ ... safety has boosted investments in new testing and ... has also given rise to a range of ... by the requirements of Generation Y, which is ... technologies. As a result, product development strategies of ...
(Date:12/4/2014)... BEACH GARDENS, Fla. , Dec. 3, 2014 ... management solutions, today announced that its DigitalPersona ® ... 4500 fingerprint readers have been deployed throughout First ... , South Carolina ... headquartered in Southern Pines, North Carolina ...
Breaking Biology News(10 mins):Biometrics Market in Japan 2014-2018: Key Vendors are DDS, Fujitsu, Hitachi and NEC 2Emerging Technologies Enable Smarter Monitoring of Assets, Push Industrial Testing, Inspection and Monitoring Market 2Emerging Technologies Enable Smarter Monitoring of Assets, Push Industrial Testing, Inspection and Monitoring Market 3Emerging Technologies Enable Smarter Monitoring of Assets, Push Industrial Testing, Inspection and Monitoring Market 4First Bank Partners with Crossmatch to Increase Log In Security 2First Bank Partners with Crossmatch to Increase Log In Security 3
... and water experts have converged at Nanyang Technological University ... research community on a scarce natural resource -- water. ... in the last fortnight as they attended the inaugural ... Last week, the university also hosted the 4th GlobalTech ...
... and Boston, MA. Wed. July 4, 2012 One of ... treatment. In the case of many forms of cancer, including ... cancer cells in the lab, but often produce only partial, ... the field of cancer research has been and remains: how ...
... researchers have discovered that recent climate change is causing leaves ... study, which is the first of its kind in the ... in climate. The results are published online today in ... Researchers analysed leaves from herbarium specimens of Narrow-leaf Hopbush ...
Cached Biology News:Wholly water -- students and scientists gather at NTU to discuss water problem 2Wholly water -- students and scientists gather at NTU to discuss water problem 3Wholly water -- students and scientists gather at NTU to discuss water problem 4Wholly water -- students and scientists gather at NTU to discuss water problem 5Tumor microenvironment helps skin cancer cells resist drug treatment 2Tumor microenvironment helps skin cancer cells resist drug treatment 3Tumor microenvironment helps skin cancer cells resist drug treatment 4Shrinking leaves point to climate change 2
(Date:12/22/2014)... Dec. 22, 2014  ( www.competitivehealth.com ) — Competitive ... medical bill review and advocacy service, has signed an ... WellCard Savings discount health services marketplace. 63% ... more than they expected to pay. As part of ... costs, WellCard Savings is pleased to offer medical bill ...
(Date:12/22/2014)... 22, 2014 Fertility Associates of Memphis ... Bank USA , a network of more than 20 ... partnership, patients have fast access to a national pool ... IVF . Fertility Associates of Memphis is the only ... treatment option. , Dr. William Kutteh , director ...
(Date:12/19/2014)... BioPlus Specialty Pharmacy (BioPlus), one ... of Nick Maroulis, Pharm.D. to the newly created position ... In this position, Dr. Maroulis will continue to manage ... of our multi-site pharmacies as the company expands. Dr. ... that time he has served in many different capacities ...
(Date:12/19/2014)... Dec. 19, 2014 Bina Technologies, Inc. (Bina, ... that they have been acquired by Roche (SIX: RO, ... privately held company that provides a big data platform ... (NGS) data for the academic and translational research markets. ... and will continue to focus on development of their ...
Breaking Biology Technology:WellCard Savings Announces CoPatient Medical Bill Review Service for Members 2Fertility Associates of Memphis Announces Partnership with Donor Egg Bank USA 2Fertility Associates of Memphis Announces Partnership with Donor Egg Bank USA 3BioPlus Specialty Pharmacy Promotes Dr. Nick Maroulis to Vice President of Specialty Pharmacy Services 2Bina Technologies is acquired by Roche. 2Bina Technologies is acquired by Roche. 3
... review demonstrates bioidentical hormones are superior to synthetic ... of breast cancerTORRANCE, Calif., Feb. 23 The ... Postgraduate Medical Journal, a leading peer-reviewed publication for ... with reduced health risks and are more efficacious ...
... - Sirius Genomics, a developer of a pharmacogenomic test ... (sold by Eli Lilly and Company under the trademark ... CEO, will present at the annual Invest Northwest Investor-CEO ... PST. The conference is presented by the Washington Biotechnology ...
... Netherlands, Feb. 23 Schering-Plough Corporation (NYSE: ... between Nobilon, Schering-Plough,s human vaccine business unit, and ... to pandemic influenza vaccine manufacturing technology to developing ... demonstrates Schering-Plough,s strong commitment to innovation and to ...
Cached Biology Technology:New Analysis Finds Bioidentical Hormones Safer Than Standard Hormone Replacement Therapy 2New Analysis Finds Bioidentical Hormones Safer Than Standard Hormone Replacement Therapy 3Sirius Genomics to Present at Invest Northwest Conference 2Schering-Plough Announces Collaboration With World Health Organization to Provide Access to Pandemic Influenza Vaccine Technology to Developing Countries 2Schering-Plough Announces Collaboration With World Health Organization to Provide Access to Pandemic Influenza Vaccine Technology to Developing Countries 3
... protein A media yield highly purified ... to analysis of other immunoglobulin classes, ... purification. Protein A binds to the ... from mammalian species. This ready-to-use, bottled ...
... bis- (3-D-Gluconamidopropyl)deoxycholamide White solid. HYGROSCOPIC. ... CHAPSO. Has reduced electrostatic interactions that do ... DEAE-cellulose. Aggregation number: 8-16. Purity: ≥95% ... O. Aggregation number 8 - 16, CMC ...
Goat Anti-Horse IgG(T) Antibody, Unconjugated...
Goat polyclonal to STMN2 ( Abpromise for all tested applications). Antigen: Synthetic peptide: AKTAMAYKEK, corresponding to C terminal amino acids 2-11 of STMN2. Entrez Gene ID: 11075 Swi...
Biology Products: