Navigation Links
Extra gene copies were enough to make early humans' mouths water
Date:9/9/2007

SANTA CRUZ, CA--To think that world domination could have begun in the cheeks. That's one interpretation of a discovery, published online September 9 in Nature Genetics, which indicates that humans carry extra copies of the salivary amylase gene.

Humans have many more copies of this gene than any of their ape relatives, the study found, and they use the copies to flood their mouths with amylase, an enzyme that digests starch. The finding bolsters the idea that starch was a crucial addition to the diet of early humans, and that natural selection favored individuals who could make more starch-digesting protein.

"Extra gene copies are an easy way for evolution to ramp up expression of a protein," said Nathaniel Dominy, assistant professor of anthropology at University of California, Santa Cruz, and one of the paper's authors. "Why wait for chance mutations to improve gene function" Natural selection can favor duplicate copies of a gene that already works well, and enzyme production will increase."

Other primates eat mainly ripe fruits containing very little starch. A new ability to supplement the diet with calorie-rich starches could have fed our large brains and opened up new food supplies that fueled our unrivaled colonization of the planet, Dominy said.

The researchers sampled saliva from 50 European-American undergraduates and found as many as 15 copies of the amylase gene per person. By comparison, all 15 chimpanzees they sampled had exactly two copies each. Students with more copies of the gene also had higher concentrations of the enzyme in their spit.

Next, the team studied groups of humans with differing diets. They found a similar correspondence between the amount of starch in a group's diet and the average number of amylase gene copies its individuals possessed. For example, the Yakut of the Arctic, whose traditional diet centers around fish, had fewer copies than the related Japanese, whose diet in
'/>"/>

Contact: Tim Stephens
stephens@ucsc.edu
831-459-2495
University of California - Santa Cruz
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Automatic extraction of gene/protein biological functions from biomedical text
2. Building a protein name dictionary from full text: a machine learning term extraction approach
3. Natural pine bark extract relieves muscle cramp and pain in athletes and diabetics
4. Gut microbes partnership helps body extract energy from food, store it as fat
5. Extraordinary life found around deep-sea gas seeps
6. Strawberry daiquiris -- the extra-healthy cocktail?
7. Extra-aggressive form of idiopathic pulmonary fibrosis identified
8. Successful lung cancer surgery not enough to break nicotine dependence in many smokers
9. Gene therapy to lower blood pressure just enough
10. A little telomerase isnt enough
11. Medical experts: US unlikely to have enough vaccines to stop avian flu
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/8/2015)... SPRINGS, Florida , July 8, 2015 ... constantly evolving as this summer,s must have products such as ... in demand as popularity for biometrics based devices continues to ... are NXT-ID, Inc. (NASDAQ: NXTD ), Google Inc. (NASDAQ: ... Inc. (NYSE: FIT ), GoPro, Inc. (NASDAQ: GPRO ...
(Date:7/2/2015)... DUBLIN , June 25, 2015 ... has announced the addition of the "Natural ... Hybrid), Technologies (Recognition, IVR, OCR, Pattern & Image ... to their offering. The key vendors ... Google, HP, IBM Corporation, Microsoft Corporation, NetBase Solutions, ...
(Date:6/30/2015)... HATFIELD, Pa. , June 30, 2015 ... joined the company as CEO to help further develop ... a wealth of partnering experience, having spent much of ... companies including Therakine, Amgen, Baxter Bioscience, and Johnson & ... a focus on Technology and Biotech Corporate Finance. He ...
Breaking Biology News(10 mins):Consumers Flock to This Summer's Must Have Tech Gadgets as Latest Digital Wallets, Smart Technology & Wearable Products Continue to Grow in Popularity & Functionality 2Consumers Flock to This Summer's Must Have Tech Gadgets as Latest Digital Wallets, Smart Technology & Wearable Products Continue to Grow in Popularity & Functionality 3Consumers Flock to This Summer's Must Have Tech Gadgets as Latest Digital Wallets, Smart Technology & Wearable Products Continue to Grow in Popularity & Functionality 4Consumers Flock to This Summer's Must Have Tech Gadgets as Latest Digital Wallets, Smart Technology & Wearable Products Continue to Grow in Popularity & Functionality 5Consumers Flock to This Summer's Must Have Tech Gadgets as Latest Digital Wallets, Smart Technology & Wearable Products Continue to Grow in Popularity & Functionality 6Natural Language Processing Market by Type (Rule-Based, Statistical, and Hybrid), Technologies (Recognition, IVR, OCR, Pattern & Image Recognition) - Worldwide Forecast to 2020 2Genisphere Appoints New CEO, Thomas Bliss 2Genisphere Appoints New CEO, Thomas Bliss 3
... dinosaurs, and he or she will likely tell you that ... to prominence and you,ll likely get a blank stare. Even ... But now, as EARTH explores in a feature in the ... the rise of dinosaurs. Learn more about this eye-opening ...
... Researchers at the University of North Carolina at Chapel Hill ... to programmed cell death or apoptosis. This molecule, a ... been shown to be in short supply in certain neurodegenerative ... discovery could herald a new treatment to prompt brain cells ...
... unable to distinguish colors, even though their close relatives ... new research by Dr. Nathan Scott Hart and colleagues ... of Queensland in Australia. Their study shows that although ... of light levels, they only have a single long-wavelength-sensitive ...
Cached Biology News:New molecule could save brain cells from neurodegeneration, stroke 2New molecule could save brain cells from neurodegeneration, stroke 3Are sharks color blind? 2
(Date:7/31/2015)... ... July 31, 2015 , ... ... detection and quantification of partially hydrolyzed gluten in foods, has been accepted by ... the method “Partially Hydrolyzed Gluten in Fermented Cereal-Based Products by R5 Competitive ELISA,” ...
(Date:7/30/2015)...   GenoSpace , a leading provider of ... of genomic and other biomedical data, today announced ... company as Vice President of Sales and Marketing. ... "GenoSpace partners with its customers to ... explore complex sets of genomic, phenotypic and other ...
(Date:7/30/2015)... , July 30, 2015 According ... Product (Software, Molecular Modeling, PB/PK, PKPD, Trial Design, Toxicity ... Development, Preclinical, Clinical Trial), by End Users - Global ... is expected to reach USD 2,107.99 million by 2020 ... of 15.29%. Browse more than ...
(Date:7/30/2015)... Senomyx , Inc. (NASDAQ: SNMX ), a leading ... and commercialize novel flavor ingredients for the food, beverage, ... the second quarter 2015. "Moving into ... to achieve our commercial and financial goals," stated John ... "Since our last quarterly earnings report, our two partners ...
Breaking Biology Technology:RIDASCREEN® Competitve Gliadin Receives AOAC Official First Action Status 2GenoSpace Introduces Matthew Fischer as Vice President of Sales and Marketing 2Biosimulation Market Worth 2,107.99 Million USD by 2020 2Biosimulation Market Worth 2,107.99 Million USD by 2020 3Biosimulation Market Worth 2,107.99 Million USD by 2020 4SENOMYX ANNOUNCES SECOND QUARTER 2015 FINANCIAL RESULTS 2SENOMYX ANNOUNCES SECOND QUARTER 2015 FINANCIAL RESULTS 3SENOMYX ANNOUNCES SECOND QUARTER 2015 FINANCIAL RESULTS 4SENOMYX ANNOUNCES SECOND QUARTER 2015 FINANCIAL RESULTS 5SENOMYX ANNOUNCES SECOND QUARTER 2015 FINANCIAL RESULTS 6SENOMYX ANNOUNCES SECOND QUARTER 2015 FINANCIAL RESULTS 7SENOMYX ANNOUNCES SECOND QUARTER 2015 FINANCIAL RESULTS 8SENOMYX ANNOUNCES SECOND QUARTER 2015 FINANCIAL RESULTS 9
... , BIRMINGHAM, Ala. , Jan. 19 ... it comes to cholesterol. According to a new study, a lipoprotein ... can be labeled "bad cholesterol." The landmark study Genetic Variants ... in the New England Journal Of Medicine provides the ...
... BANGALORE, India , January 19 , ... Excellence , A team of cardiac experts led by ... Network Hospital of Fortis),has performed a major open heart surgery on a 2-year-old ... defect called - Tetralogy of,Fallot or complex blue baby syndrome. , ...
... , , RANCHO SANTA MARGARITA, Calif. , Jan. ... important for the development, growth, and maintenance of a healthy body, ... D within minutes of whole body exposure to sunlight. From what ... by chance," states Dr. John Cannell , Executive Director, Vitamin ...
Cached Biology Technology:New Study: Lp(a) Joins LDL as Heart Disease Risk Factor 2New Study: Lp(a) Joins LDL as Heart Disease Risk Factor 32-Year-old Baby With Complex Heart Deformity Undergoes Major Open Heart Surgery at Wockhardt Hospitals, Bangalore - (now a Network Hospital of Fortis) Without any Blood Transfusion 22-Year-old Baby With Complex Heart Deformity Undergoes Major Open Heart Surgery at Wockhardt Hospitals, Bangalore - (now a Network Hospital of Fortis) Without any Blood Transfusion 3Cancer, Heart Disease, Stroke, Diabetes, Chronic Pain and Depression Share a Major Pathology Factor 2Cancer, Heart Disease, Stroke, Diabetes, Chronic Pain and Depression Share a Major Pathology Factor 3
... provide two highly efficient methods of identifying ... preparation. By using the large-scale screen method ... do is to transfer partial colonies of ... plates into the solutions provided by the ...
GLP-1 (HYB 147-12)...
... Immunogen KLH-conjugated, synthetic ... 54-75 (RRGPHRNPG-PGDDDGQRSRSSS) of mouse p19ARF. ... to amino acids 62-75. Clone ... Routinely evaluated by immunoblot. ...
EDTA, tetrasodium salt, 1 kg. Ethylene diaminetetraacetic acid.Dihydrate. Assay: 99-101% (as is).Risks: 36, 37, 38 ; Safety Precautions: 22, 36, 37. Category: Nucleotides & Enzymes & Biochemicals, Ul...
Biology Products: