Summary
New catalytic reaction between a solid bioorganic compound and activated spillover tritium (ST), based on High-temperature Solid-state Catalytic Isotopic Exchange (HSCIE) was examined. The HSCIE mechanism and determination of the reactivity of hydrogen atoms in amino acids, peptides and proteins was investigated. Quantum mechanical calculations of the reactivity of hydrogen atoms in amino acids in the HSCIE reaction were done. The carbon atom with a greater proton affinity undergoes a greater exchange of hydrogen for tritium in HSCIE. The electrofilic nature of spillover hydrogen in the reaction of HSCIE was revealed. The isotope exchange between ST and the hydrogen of the solid organic compound proceeds with a high degree of configuration retention at the carbon atoms. The HSCIE reaction enables to synthesize tritium labeled proteins with a specific activity of 20–30 mCi/mg and kept biological activity.
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Zolotarev, Y.A., Dorokhova, E.M., Nezavibatko, V.N. et al. The solid-state catalytic synthesis of tritium labeled amino acids, peptides and proteins. Amino Acids 8, 353–365 (1995). https://doi.org/10.1007/BF00806553
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DOI: https://doi.org/10.1007/BF00806553