An international group of scientists including visiting foreign professor from RUDN University Kamran Makhmudov has analyzed chemical bonds in proteins based on sulfur and other elements from the 16th group of the periodic table. Such atoms are called chalcogens, and the bonds are known as chalcogen bonds. The results were published in Dalton Transactions, and will be presented at the International Chugaev Conference on Coordination Chemistry to be held from October 2 to 6 in Nizhny Novgorod (Russia).