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The analysis of lipid-phospholipid oxidation products is of primary importance. Although there are established HPLC and LC-MS techniques, it is shown here for the first time that the combination of matrix-assisted laser desorption and ionization time-of-flight (MALDI-TOF) mass spectrometry (MS) and TLC represents a sensitive, fast, and convenient alternative. A mixture of 1-palmitoyl-2-linoleoyl-sn-phosphatidylcholine...
Photoreactivable 5-l3-(p-iodoazidosalicylamide)allylJ-UDP-GlcNAc (5-IASA-UDP- -GlcNAc) was synthesized by a four-step procedure and used for photoaffinity labeling of UDP-GlcNAc-dependent enzymes. Upon iodination with 12SI, the compound was successfully applied to probe a purified UDP-GlcNAc pyrophosphorylase from pig liver. The enzyme was photoinactivated by the probe in the concentration-dependent...
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