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WASHINGTON, April 6 (Xinhua) -- U.S. researchers have discovered two genes in which variation affects intake of caffeine, the most widely consumed stimulant in the world, according to a report described Wednesday in the open-access journal PLoS Genetics.A team of investigators from the National Cancer Institute, Harvard School of Public Health, Brigham and Women's Hospital, and the University of North Carolina at Chapel Hill examined genetic variation across the entire genome of more than 47,000 individuals from the U.S.They found the genes -- CYP1A2, which has previously been implicated in the metabolism of caffeine, and AHR, involved in the regulation of CYP1A2, played roles in regulating intake of caffeine. Individuals with the highest-consumption genotype for either gene consumed 40 mg more caffeine than those with the lowest-consumption genotype, equivalent to the amount of one-third cup of caffeinated coffee, or one can of cola.Caffeine is implicated in numerous physiological and medical conditions; it affects sleep patterns, energy levels, mood, and mental and physical performance. The identification of genes that have an impact on daily consumption offers opportunities to better understand these conditions. Further exploration of the identified genetic variants may provide insight into the speed of caffeine metabolism, how long caffeine circulates in the blood, or how strong the physiological effects of consuming a given amount of caffeine are.

VIENNA, April 12 (Xinhua) -- A protein group has been identified as an "allergy multiplier" that causes food allergy, a symptom that could also accompany other allergies and produce serious consequences, Austrian researchers said Tuesday.The so-called non-specific lipid transfer proteins (nsLTP) are believed to be the causes of food allergy, a research team from the Medical University of Vienna said in a new report.These plant allergens are found not only in many fruits and vegetables, but also in cereals and some types of pollen. Due to their compact structures, they are not degraded in the gastrointestinal tract and can trigger immune reactions that cause severe allergic symptoms, said the report.The researchers believe that with nsLTP identified as an " allergy multiplier," diagnostic and treatment procedures could be adapted and improved.

BEIJING, Jan. 19 (Xinhua) -- China's central government on Wednesday called on local authorities to step up efforts to ensure a stable market supply of daily necessities, such as food and clothing, as freezing weather continues to plague south and southwest China.The Ministry of Commerce required local government departments to guide companies to increase supplies such as rice, edible oil, meat and vegetables.It also required local departments to closely watch market changes and release reserves of commodities when necessary, said a statement on its website.The statement said the government of southwest China's Chongqing Municipality has urged local supermarkets to maintain the prices of 10 types of vegetables that are affordable to the public, while authorities in the rain and snow-battered Guizhou and Hunan provinces guided logistics companies and wholesales markets to take measures to insure supplies.The Ministry of Agriculture on Wednesday also ordered local departments to expand areas for growing vegetables when conditions allow, as agricultural experts were also sent to fields to help farmers save their crops.The country's meteorological authority forecast Wednesday that over the next three days, heavy snow and icy rain would continue in provinces and municipalities including Guizhou, Hubei, Hunan, Jiangxi, and Chongqing.

SANAA, Feb. 6 (Xinhua) -- In response to earlier reports that a Chinese-flagged commercial ship was hijacked by Somali pirates off Yemeni coast, the China Maritime Search and Rescue Center (MSA) said Sunday that the ship has never been hijacked, and is now sailing safely with escort of the Chinese anti-piracy navy fleet.Both the "Tien Hau" ship, which was registered in Hong Kong, China, and its 22-member crew, are safe, a MSA official confirmed to Xinhua over the phone. The center contacted the ship to make sure it was safe, he added.The ship had been followed by a suspicious boat for a while, but it was never attacked or hijacked, the official said.Earlier, Yemeni Interior Ministry had said the ship was hijacked by pirates some 20 kilometers off the Yemeni island of Al-Tair off the city port of al-Hudaida, and was heading to Somali coast.The Gulf of Aden is considered as one of the world's most dangerous waters because of rampant piracy.

BEIJING, Feb. 1 (Xinhua) -- Wu Bangguo, chairman of the Standing Committee of the National People's Congress of China, on Monday sent congratulatory messages to Myanmar's newly-elected upper house speaker U Khin Aung Myint and lower house speaker Thura U Shwe Mann, respectively,on their taking offices.Myanmar's house of nationalities (upper house) session on Monday elected U Khin Aung Myint, Minister of Culture, as speaker of the upper house.Also on Monday, No. 3 Myanmar state leader Thura U Shwe Mann, who is a member of the State Peace and Development Council and previously the Chief of General Staff of the army, the navy and the air force, was elected as speaker of the house of representatives by the house of representatives (lower house).