Researchers have made a groundbreaking discovery, establishing ammonium chloride as a sixth basic taste sensation, alongside sweet, sour, salty, bitter, and umami.

This revelation sheds light on the tongue's ability to detect this distinct taste, primarily found in some Scandinavian candies.

The study, published in the journal Nature Communications, uncovers the underlying mechanisms of this taste perception, which has eluded scientists for decades.

<h2>Ammonium chloride taste in Scandinavian candies</h2>

The research highlights ammonium chloride's unique taste, a favoured ingredient in certain Scandinavian confections.

Neuroscientist Emily Liman, a co-author of the study from the University of Southern California, told the Independent&nbsp;that residents of Scandinavian countries may already be familiar with and appreciate this taste.

Salt licorice, a popular candy in northern European nations, commonly contains salmiak salt or ammonium chloride.

Also read |&nbsp;<a href="https://www.wionews.com/world/world-crosses-key-15-c-warming-mark-for-record-number-of-days-in-2023-report-643608">World crosses key 1.5 C warming mark for record number of days in 2023: Report</a>

<h2>Tongue's response mechanism</h2>

While previous knowledge indicated the tongue's reaction to ammonium chloride, identifying the specific protein receptors responsible had remained elusive.

Recent research had previously uncovered the protein OTOP1, which plays a pivotal role in detecting sour tastes. It functions as a channel for hydrogen ions when exposed to acidic sour foods, like lemonade and vinegar.

Researchers hypothesised that ammonium chloride might also activate OTOP1 due to its impact on hydrogen ion concentration within cells.

Scientists introduced the gene responsible for the&nbsp;OTOP1 receptor into lab-grown human cells, allowing them to produce the OTOP1 receptor.

These cells were then subjected to acid or ammonium chloride exposure, and their responses were meticulously measured.

The study found that ammonium chloride robustly activated the OTOP1 channel, rivalling or surpassing acid's activation levels.

Small quantities of ammonia from ammonium chloride entered the cell, leading to a rise in pH and fewer hydrogen ions.

This pH difference drove an influx of hydrogen ions through OTOP1, detectable through changes in electrical conductivity across the channel.

Also watch |&nbsp;What impact does extreme weather conditions have on a human body?

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Taste bud cells from normal mice exhibited a significant increase in action potentials in response to ammonium chloride, while cells lacking OTOP1 showed no such response, confirming OTOP1's role in perceiving ammonium chloride.

Researchers noted that the OTOP1 channel displayed varying sensitivity to ammonium chloride among different species.

This divergence suggests that the ability to taste ammonium chloride may have evolved as an adaptation to avoid consuming potentially harmful substances rich in ammonium.

&nbsp;

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Researchers have made a groundbreaking discovery, establishing ammonium chloride as a sixth basic taste sensation, alongside sweet, sour, salty, bitter, and umami.

Researchers have made a groundbreaking discovery, establishing ammonium chloride as a sixth basic taste sensation, alongside sweet, sour, salty, bitter, and umami. This revelation sheds light on the tongue's ability to detect this distinct taste, primarily found in some Scandinavian candies. The study, published in the journal Nature Communications, uncovers the underlying mechanisms of this taste perception, which has eluded scientists for decades. Ammonium chloride taste in Scandinavian candies The research highlights ammonium chloride's unique taste, a favoured ingredient in certain Scandinavian confections. Neuroscientist Emily Liman, a co-author of the study from the University of Southern California, told the Independent that residents of Scandinavian countries may already be familiar with and appreciate this taste. Salt licorice, a popular candy in northern European nations, commonly contains salmiak salt or ammonium chloride. Also read | World crosses key 1.5 C warming mark for record number of days in 2023: Report Tongue's response mechanism While previous knowledge indicated the tongue's reaction to ammonium chloride, identifying the specific protein receptors responsible had remained elusive. Recent research had previously uncovered the protein OTOP1, which plays a pivotal role in detecting sour tastes. It functions as a channel for hydrogen ions when exposed to acidic sour foods, like lemonade and vinegar. Researchers hypothesised that ammonium chloride might also activate OTOP1 due to its impact on hydrogen ion concentration within cells. Scientists introduced the gene responsible for the OTOP1 receptor into lab-grown human cells, allowing them to produce the OTOP1 receptor. These cells were then subjected to acid or ammonium chloride exposure, and their responses were meticulously measured. The study found that ammonium chloride robustly activated the OTOP1 channel, rivalling or surpassing acid's activation levels. Small quantities of ammonia from ammonium chloride entered the cell, leading to a rise in pH and fewer hydrogen ions. This pH difference drove an influx of hydrogen ions through OTOP1, detectable through changes in electrical conductivity across the channel. Also watch | What impact does extreme weather conditions have on a human body? Taste bud cells from normal mice exhibited a significant increase in action potentials in response to ammonium chloride, while cells lacking OTOP1 showed no such response, confirming OTOP1's role in perceiving ammonium chloride. Researchers noted that the OTOP1 channel displayed varying sensitivity to ammonium chloride among different species. This divergence suggests that the ability to taste ammonium chloride may have evolved as an adaptation to avoid consuming potentially harmful substances rich in ammonium. WATCH WION LIVE HERE:

New flavour profile? Scientists uncover tongue's sixth basic taste

At 65, Ramon Alfonso has seen a lot of history in his native Cuba. But this is the first time he has eaten a vegan salad. 
 
After decades of Communist rule and centuries of eating meat and beans, the island is opening up, and so are its taste buds. 
 
Sitting at Cafe Bohemia on Havana&#39;s Old Square, Alfonso gobbles lettuce, eggplant and cabbage. 
 
There is not an ounce of pork and rice in sight, but in the searing heat, that suits him just fine. 
 
&quot;I don&#39;t know if I&#39;ll be eating this every day because I&#39;m not used to it,&quot; he says. 
 
&quot;But it is tasty. And it&#39;s better for the health and for the weather in a tropical country like this.&quot; 
 
Under the communist regime, the few diners who could afford to step out for dinner faced dreary state-run eateries with stodgy food and bad service.&nbsp;Now those state-run restaurants are empty. 
 
 
New moussaka 
The government authorised privately-run restaurants five years ago, and the change was slow to take effect. But with more tourists coming to Cuba in the past year, its impact is clear to see now on the terraces of Havana. 
 
At one state-run joint in Havana&#39;s old quarter, four waiters sit chatting with not a single one of the tables occupied. 
 
A few dozen yards away, the privately-run Cafe de las Letras is crammed with diners munching its trademark moussaka.&nbsp;With eggplant smothered in meat and cheese, that is a novel dish for Cubans who were used to eating the vegetable fried in breadcrumbs. 
 
At another of Havana&#39;s new wave of trendy restaurants, Versus 1900, the smell of rosemary fills the kitchen. 
 
Chef Alain Prieto is seasoning mutton in a Peruvian-inspired fusion creation. Beside him a colleague is cooking crispy vegetable tempura. 
 
&quot;International dishes have been added to the traditional creole cuisine,&quot; Prieto says. 
 
&quot;People are starting to eat differently,&quot; he adds. &quot;More refined.&quot; 
 
 
How now, fried cow 
In a kitchen workshop run by the country&#39;s Culinary Federation, its president Eddy Fernandez chucks a spot of oil in the pan and adds peppers, onion and garlic. 
 
The shredded beef is pre-cooked and goes into the pan to sizzle briefly. 
 
A splash of white wine and it is ready: his modern take on the Cuban classic vaca frita, or &quot;fried cow&quot;. 
 
Fernandez is helping train a new generation of Cuban chefs. 
 
Demand for their services has surged in the past two years, he says, and standards have risen. 
 
The health ministry says 45 per cent of adults in Cuba are overweight and 12 per cent suffer full obesity. 
 
Chefs are wanted who can cook classic Cuban dishes but &quot;with less fat and sugar, little salt and more fruit and vegetables&quot;, Fernandez says. 
 
 
Outside influence 
When Italian chef Annalisa Gallina arrived in Cuba three years ago, she says, salad was something stuck on the side of the plate as a decoration. 
 
The country&#39;s cooking was still emerging from the economic crisis that followed the collapse of its ally, the Soviet Union. 
 
That crisis limited eating options in a country that imports most of its ingredients. 
 
For many Cubans, &quot;if it doesn&#39;t have rice, beans and meat, it isn&#39;t food,&quot; says Gallina, 37, who works at Cafe Bohemia. 
 
&quot;The Cubans who are most open to vegetarian cooking are the ones who have had the chance to travel abroad.&quot; 
 
President Raul Castro took over from his brother Fidel, leader of the 1959 revolution, in 2008. 
 
He has loosened travel restrictions for Cubans. 
 
The government&#39;s migration department says hundreds of thousands of Cubans have traveled abroad since 2013. 
 
Castro has also authorised some private businesses and has transferred state eateries to private hands. 
 
&quot;That is a good thing,&quot; says Fernandez. &quot;State gastronomy was not working.&quot; 
 
 
Local produce 
The new generation of restaurateurs faces the challenge of pleasing the four million tourists now coming to Cuba every year -- including a growing number of US visitors. 
 
In the kitchen at Versus 1900, Prieto and colleague Omar Gil show off their organic goods: cherry tomatoes, raisins and strawberries. 
 
They have grown the ingredients in their own garden. 
 
&quot;There is lots of produce to make the most of in Cuba,&quot; says Gallina at Cafe Bohemia. 
 
Cubans are used to fruit juice, but not like the exotic mixes she serves: guava with pepper and basil, carrot with ginger or pineapple with mint. 
 
Cooking programs on Cuban television have multiplied. 
 
&quot;You sit down in a park with wifi and download a recipe. That is how we have learned,&quot; says Prieto. 
 
&quot;We want to go on like that and improve Cuban cooking.&quot; 
 
(AFP)

With more tourists coming in the past year, restaurants are attempting a breakaway from centuries of eating meat and beans

At 65, Ramon Alfonso has seen a lot of history in his native Cuba. But this is the first time he has eaten a vegan salad. After decades of Communist rule and centuries of eating meat and beans, the island is opening up, and so are its taste buds. Sitting at Cafe Bohemia on Havana's Old Square, Alfonso gobbles lettuce, eggplant and cabbage. There is not an ounce of pork and rice in sight, but in the searing heat, that suits him just fine. "I don't know if I'll be eating this every day because I'm not used to it," he says. "But it is tasty. And it's better for the health and for the weather in a tropical country like this." Under the communist regime, the few diners who could afford to step out for dinner faced dreary state-run eateries with stodgy food and bad service. Now those state-run restaurants are empty. New moussaka The government authorised privately-run restaurants five years ago, and the change was slow to take effect. But with more tourists coming to Cuba in the past year, its impact is clear to see now on the terraces of Havana. At one state-run joint in Havana's old quarter, four waiters sit chatting with not a single one of the tables occupied. A few dozen yards away, the privately-run Cafe de las Letras is crammed with diners munching its trademark moussaka. With eggplant smothered in meat and cheese, that is a novel dish for Cubans who were used to eating the vegetable fried in breadcrumbs. At another of Havana's new wave of trendy restaurants, Versus 1900, the smell of rosemary fills the kitchen. Chef Alain Prieto is seasoning mutton in a Peruvian-inspired fusion creation. Beside him a colleague is cooking crispy vegetable tempura. "International dishes have been added to the traditional creole cuisine," Prieto says. "People are starting to eat differently," he adds. "More refined." How now, fried cow In a kitchen workshop run by the country's Culinary Federation, its president Eddy Fernandez chucks a spot of oil in the pan and adds peppers, onion and garlic. The shredded beef is pre-cooked and goes into the pan to sizzle briefly. A splash of white wine and it is ready: his modern take on the Cuban classic vaca frita, or "fried cow". Fernandez is helping train a new generation of Cuban chefs. Demand for their services has surged in the past two years, he says, and standards have risen. The health ministry says 45 per cent of adults in Cuba are overweight and 12 per cent suffer full obesity. Chefs are wanted who can cook classic Cuban dishes but "with less fat and sugar, little salt and more fruit and vegetables", Fernandez says. Outside influence When Italian chef Annalisa Gallina arrived in Cuba three years ago, she says, salad was something stuck on the side of the plate as a decoration. The country's cooking was still emerging from the economic crisis that followed the collapse of its ally, the Soviet Union. That crisis limited eating options in a country that imports most of its ingredients. For many Cubans, "if it doesn't have rice, beans and meat, it isn't food," says Gallina, 37, who works at Cafe Bohemia. "The Cubans who are most open to vegetarian cooking are the ones who have had the chance to travel abroad." President Raul Castro took over from his brother Fidel, leader of the 1959 revolution, in 2008. He has loosened travel restrictions for Cubans. The government's migration department says hundreds of thousands of Cubans have traveled abroad since 2013. Castro has also authorised some private businesses and has transferred state eateries to private hands. "That is a good thing," says Fernandez. "State gastronomy was not working." Local produce The new generation of restaurateurs faces the challenge of pleasing the four million tourists now coming to Cuba every year -- including a growing number of US visitors. In the kitchen at Versus 1900, Prieto and colleague Omar Gil show off their organic goods: cherry tomatoes, raisins and strawberries. They have grown the ingredients in their own garden. "There is lots of produce to make the most of in Cuba," says Gallina at Cafe Bohemia. Cubans are used to fruit juice, but not like the exotic mixes she serves: guava with pepper and basil, carrot with ginger or pineapple with mint. Cooking programs on Cuban television have multiplied. "You sit down in a park with wifi and download a recipe. That is how we have learned," says Prieto. "We want to go on like that and improve Cuban cooking." (AFP)

Culinary revolution tingles taste buds in Cuba

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