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- W1973703841 abstract "Abstract Pyridoxal hydrochloride and alanine react in water with UO 2 (NO 3 ) 2 ·6H 2 O giving [(UO 2 PmHpyr) 3 (μ 3 ‐O)]Cl·3H 2 O ( 1 ), a trinuclear chelate of uranium(VI). The ligand PmHpyr − (pyridoxaminylpiruvate anion) results from the transamination of alanine with pyridoxal in the presence of the uranyl cation. The coordination polyhedron of the individual uranium atoms can be described as pentagonal bipyramides. In the structure of 1 the cations [(UO 2 PmHpyr) 3 (μ 3 ‐O)] + interact reciprocally achieving a supramolecular assembling of [(UO 2 PmHpyr) 3 (μ 3 ‐O)] cores indirectly linked to six surrounding ones through N + –H···Cl − interactions. Each chloride ion is bonded to three [(UO 2 PmHpyr) 3 (μ 3 ‐O)] + moieties (and reverse), reaching both ions a planar coordination number 6. There are evidences that pyridoxal or pyridoxal 5‐phosphate in the presence of UO 2 2+ afford the transamination also of other amino acids used by the cells in protein biosynthesis. This extensive reaction in the blood plasma could represent a probable mechanism of uranium intoxication, e.g. by deactivation of the vitamin B6 derivatives pyridoxal or pyridoxamine through reaction with the corresponding α‐keto acid and further chelation of the uranyl cation." @default.
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- W1973703841 date "2007-04-10" @default.
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- W1973703841 title "Reversible Transamination of Alanine with Pyridoxal (Vitamin B6) in the Presence of the UO22+ Ion: Synthesis and X-ray Characterization of [(UO2PmHpyr)3(μ3-O)]Cl·3H2O (PmHpyr = Pyridoxaminylpiruvate Anion)" @default.
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- W1973703841 doi "https://doi.org/10.1002/zaac.200600364" @default.
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