Glycosyl residues

Glc = glucose Gal = galactose Man = mannose Xyl = xylose Api = apiose Ara = arabinose Rha = rhamnose Fuc = fucose GlcA = glucuronic acid Gal A = galacturonic acid p = pyranose ring form f = furanose ring form. 

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Carb-31. Names for monosaccharide residues 2-Carb-31.1. Glycosyl residues... 

Cyclic oligosaccharides composed of a single type of residue can be named by giving the systematic name of the glycosyl residue, preceded by the linkage type in parentheses, preceded in turn by cyclo- with a multiplicative suffix (i.e. cyclohexakis- etc.)... 

Glycosyl residues, nomenclature, 125 Glycosyl sulfones, as glycosyl donors, 199— 200... 

Fischer projection of acyclic form, 56-57 glycosides, 132-135 C-glycosyl compounds, 139-140 N-glycosyl derivatives, 137-139 glycosyl halides, 136-137 glycosyl residues, 125 isotopic substitution and isotopic labelling, 91 me so forms, 59 optical rotation, 59 parent structure choice, 53... 

Rhamnogalacturonan 11 (RG-11) is a structurally complex, pectic polysaccharide that is present in the primary cell-walls of higher plants. It is composed of 60 glycosyl residues, and is a very complex molecule indeed. For example, on acid hydrolysis, at least ten different monosaccharides are formed, including the novel aceric acid (30), which is the only branched-... 

Compound Glycose residue Glycosyl group Glycosyl residue ... 

It thus appears that the taste of the dihydrochalcones is not solely controlled by the sugar moiety, and subsequent studies 220 confirmed this. The flavanone 78 and the non-glycosidic dihydrochalcone 81 are intensely sweet. Furthermore, replacement of the bulky glycosyl residue by carboxyalkyl " (82) or sulfoalkyl (83) substituents did not significantly... 

Glycosyl-residue compositions were determined by GC-CIMS analysis of the per-O-trimethylsilylated methyl glycosides [23] separated on a fused-silicaDB-1 capillary column. The identity of each peak was confirmed by CIMS on a HP-5989 MS Engine (Hewlett-Packard). 

The glycosyl-residue compositions of the three purified fractions (Table 1) were very similar with a predominance of galacturonic acid, rhamnose and arabinose. The presence in the three purified fractions of the rare monosaccharides characteristic of RG-II (e.g. 2-( -methyl-L-fucose, 2-O-methyl-D-xylose, apiose, Kdo, Dha and aceric acid) was confirmed by GC-CIMS analysis. The molar ratios corresponded approximately to the known structure of the RG-II molecule (Figure 1) and to previously published data for RG-II from sycamore [26], rice [4], arabidospis leaves [8] and Pectinol [12]. 

Glycosyl-residue composition (mol %) of RG-II isolated from fruit-derived products... 

Glycosyl residue Linkage Red Wine Apple Juice Tomato Juice... 

Data from (21), glycosyl residues <1% of total are not shown An unidentified uronic acid... 

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