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Summary. No influence of isotopic substitution in deuterium-substituted tryptophan on the florescence excitation spectrum has previously been found out. Here, the isotopic effects of electronic excitation of deuterium-substituted tryptophan were experimentally and theoretically analyzed for first time. It was shown a short-wave shift of the UV-absorption maximum at 220 nm corresponding to the 360...
Summary.The mechanism of the reaction of high temperature solid state catalytic isotope exchange (HSCIE) of hydrogen in peptides with spillover-tritium at 140180C was analyzed. This reaction was used for preparing [3H]enkephalins such as [3H]DALG with specific activity of 138Ci/mmol and [3H]LENK with specific activity of 120Ci/mmol at 180C. The analogues of [3H]ACTG410 with specific activity of 80Ci/mmol,...
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