Enzymatic Methods for Carbohydrate Analysis

Enzymatic methods for carbohydrate analysis encompass a broad suite of techniques that exploit the specificity and catalytic power of enzymes to detect, quantify and characterise sugars and polysaccharides. Central approaches include enzyme-coupled spectrophotometric assays, in which target carbohydrates are converted by glycosidases or oxidases into products that can be measured colourimetrically or fluorometrically. Common examples are glucose oxidase–peroxidase systems for glucose quantification and hexokinase–glucose-6-phosphate dehydrogenase assays for high-precision measurements. These methods offer high specificity, minimal interference from complex sample matrices and adaptability to microplate formats for high-throughput screening. Complementary techniques employ immobilised enzymes in biosensors, enabling real-time monitoring of sugar concentrations in food, clinical and industrial settings. Advances in automated microfluidic platforms and multiplexed enzyme arrays have further expanded analytical throughput, allowing simultaneous profiling of multiple saccharides. Enzymatic strategies are also integral to activity assays for carbohydrate-active enzymes, coupling substrate hydrolysis to reducing-sugar detection. Such assays underpin research into biomass conversion, biofuel production and quality control in food and pharmaceutical industries. Overall, enzymatic methods combine sensitivity, selectivity and scalability, making them indispensable tools for fundamental research and applied carbohydrate analysis across diverse fields.

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Enzymatic Methods for Carbohydrate Analysis publication trend

The graph below shows the total number of articles in enzymatic methods for carbohydrate analysis across all publications each year (not limited to Nature Index journals).

Technical terms

Reducing sugar: a sugar bearing a free aldehyde or ketone group capable of reducing metal ions in colourimetric assays.
Nelson–Somogyi (NS) assay: a copper-reduction colourimetric method for quantifying reducing sugars based on formation of a blue cuprous complex.
3,5-Dinitrosalicylic acid (DNS) assay: a spectrophotometric assay in which reducing sugars reduce DNS to a coloured nitro compound.
Endo-1,4-β-xylanase: a glycosidase that hydrolyses internal β-1,4 bonds in xylan polysaccharides.
Microtiter plate: a multi-well format that enables parallel processing of small-volume assays for high throughput.

References

1. Comparison of Two Methods for Assaying Reducing Sugars in the Determination of Carbohydrase Activities. International Journal of Analytical Chemistry (2011).
2. Adapting the reducing sugars method with dinitrosalicylic acid to microtiter plates and microwave heating. Journal of the Brazilian Chemical Society (2012).
3. A Comparison of Polysaccharide Substrates and Reducing Sugar Methods for the Measurement of endo-1,4-β-Xylanase. Applied Biochemistry and Biotechnology (2015).