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- W2153162686 abstract "The monosaccharides GlcNAc (N-acetylglucosamine) and the home-made GlcNC(16) (N-palmitoyl-D-glucosamine) were labeled with 2-AB (2-aminobenzamide) by reductive amination of the sugar. The aldehyde group of the monosaccharide reacts with the amino group of 2-AB, forming a Schiff base. In the second step, the Schiff base is reduced with sodium cyanoborohydride to yield a stable secondary amine. We describe here a simple and fast procedure. Previous studies reported the same labeling at high concentration (10(-1) M) during 30 h with further purification steps. In the present paper all operations were carried out in an Eppendorf tube and the reaction medium was directly analyzed without purification. Using the described protocol, the whole procedure can be accomplished in less than 6 h at 65 degrees C at very low concentration (10(-4) M). For both GlcNC(16) and GlcNAc, the 2-AB labeling conditions were optimized and, in addition, new conditions of high-performance liquid chromatography analysis were developed. These N-alkylated sugars were analyzed on reversed-phase HPLC with fluorimetric detection at excitation and emission wavelengths of 340 and 400 nm, respectively. The separation was achieved on a C(18) column with a gradient mobile phase composed of water (0.1% formic acid)-methanol (volume varying) in less than 19 min with 12.5 and 18.3 min retention times for GlcNAc and GlcNC16, respectively. Positive-ion electrospray ionization mass spectrometry (ESI-MS) analysis enabled their structural determination." @default.
- W2153162686 created "2016-06-24" @default.
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- W2153162686 date "2009-01-01" @default.
- W2153162686 modified "2023-10-14" @default.
- W2153162686 title "Optimized conditions for 2-aminobenzamide labeling and high-performance liquid chromatography analysis of<i>N</i>-acylated monosaccharides" @default.
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- W2153162686 doi "https://doi.org/10.1002/bmc.1299" @default.
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