2-Aminoacridone is a highly fluorescent aromatic, which contains a primary amine group that reacts with an aldehyde group at the reducing end of a carbohydrate and is reduced to a stable amine derivative by sodium borohydride (NaBH4). Picomolar levels of glycan compounds can be detected using this fluorophore. The resulting derivatzed compounds can be separated by reverse-phase HPLC and detected by positive-ion electrospray MS . An intense fluorescent, hydrophobic probe that is stable over a wide pH range is useful in the derivatization of glycans to allow for the analysis of complex oligosaccharides using micellar electrokinetic capillary chromatography and reverse- and normal-phase chromatography coupled with mass spectroscopy to determine relative concentrations and structural identity of individual oligosaccharides . The λ excitation and λ emission are 425 nm and 532 nm, respectively.
Fluorescent label for glycans and saccharides.
Fluorescent label for glycans and saccharides. The analysis of fluorophore-labeled glycans by high-resolution polyacrylamide gel electrophoresis.
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Malondialdehyde (MDA) has become a well-established biomarker for oxidative stress. The most commonly used way to determine urinary MDA levels is the thiobarbituric acid (TBA) assay, which suffers from several drawbacks. In this manuscript, we describe a novel derivatization strategy
In this study, we developed an on-line reverse-phase high-performance liquid chromatography-electrospray ionization-mass spectrometry (RP-HPLC-ESI-MS) separation and structural characterization of hyaluronan (HA)/chondroitin sulfate (CS)/dermatan sulfate (DS) disaccharides released by enzymatic treatment and derivatized with 2-aminoacridone (AMAC), providing a high-resolution system also
Various combinations of fluorescent dyes, polyacrylamide gels, and electrophoresis buffers were tested by fluorophore-assisted carbohydrate electrophoresis (FACE) for the purpose of analyzing sulfated and nonsulfated glycosaminoglycan (GAG) oligosaccharides in which disaccharides and low-molecular weight oligosaccharides were included. A nonionic fluorescent
Journal of the American Society for Mass Spectrometry, 29(6), 1099-1110 (2018-03-14)
The human complement hetero-trimeric C8αβγ (C8) protein assembly (~ 150 kDa) is an important component of the membrane attack complex (MAC). C8 initiates membrane penetration and coordinates MAC pore formation. Here, we charted in detail the structural micro-heterogeneity within C8, purified from
To improve the separation of monosulfate glycosaminoglycan disaccharide isomers by microchip electrophoresis, we found that addition of 1,4-dioxane (DO) dramatically improved analyte resolution, probably due to solvation effects. Methylcellulose (MC) was tested for the ability to suppress EOF and analyte
Glycans play a key role in protein structure and disease; representation on cell surfaces is the glycome.
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