The mystery of smell enabled

They discovered nearly a million variations on 400 smell that everyone can smell it.

Researchers at Duke University in Durham, North Carolina, said a different amino acid on the same genes in the body decided that person to smell pleasant.

According to the Human Genome Project 1000, there are about 900,000 genetic variation on 400 olfactory cells in the human nose.

This olfactory cells identify the smell and smell that will activate a division of olfactory cells in the nose, signaling to the brain.

According to Professor of molecular genetics and microbiology Hiroaki Matsunami, University of medical sciences, said: the activity in different cells in the body. "There are many people who said this smells like, but others don't like. This very popular ".

Hiroaki Matsunami led a group of scientists discover the cause of the smell in the nose. The researchers discovered that no people would smell the same.

"We found that each person is capable of receiving different smells. Means when we smell something, the olfactory cells are activated between different people and different people, depending on the genome "Dr. Matsunami said.

He explained that when comparing the olfactory cells in any two people then they would have about 30% different, this number is relative in nature.

Previously, researchers have identified the genes coding for the smell of humans.

To determine the olfactory cells works and why people smell different odors out again, his team had cloned more than 500 olfactory cells from 20 people sensitive to 1 or 2 type of amino acid.

The experiment was conducted by 73 different aromatherapy smell in very small concentrations, such as vanillin (one of the chemical ingredients of the aroma and flavor of vanilla) or guaiacol (a aromatic substances derived from wood oil) the Group was able to identify 27 significant reaction cell for at least a glimpse.

This discovery, published in the December of Nature Neuroscience, doubling the number of odor receptors activate known, raising the number 40.

Dr. Matsunami said the study could have major implications for the perfume industry, and food industry.

"The manufacturers all want the mystery of smell to produce new chemicals that many people are interested in, whether it is a new perfume or new flavor ingredient, but right now yet have scientific basis to do that," he said.

"To do that, we need to know are the olfactory cells are activated by a number of chemicals and the effect of the trigger in the smell and feel".=