ERIC Number: EJ1069012
Record Type: Journal
Publication Date: 2015-Jul
Abstractor: As Provided
Reference Count: 24
[superscript 1]H NMR Spectroscopy-Based Configurational Analysis of Mono- and Disaccharides and Detection of ß-Glucosidase Activity: An Undergraduate Biochemistry Laboratory
Periyannan, Gopal R.; Lawrence, Barbara A.; Egan, Annie E.
Journal of Chemical Education, v92 n7 p1244-1249 Jul 2015
A [superscript 1]H NMR spectroscopy-based laboratory experiment explores mono- and disaccharide structural chemistry, and the enzyme-substrate specificity of glycosidic bond cleavage by ß-glucosidase towards cellobiose (ß-linked gluco-disaccharide) and maltose (a-linked gluco-disaccharide). Structural differences between cellobiose, maltose, and the glycolytic product glucose are established in terms of chemical shift changes and J-coupling constants of the anomeric proton peaks. The distinct anomeric proton signals observed in the 4.0-5.5 ppm range of glucose, cellobiose, and maltose spectra serve as a signature NMR feature to monitor the substrate specificity of ß-glucosidase towards cellobiose as a substrate. This experiment consolidates carbohydrate structural chemistry and NMR spectroscopy as applied to investigate enzyme specificity in the context of a biochemistry laboratory experiment with hands-on NMR experience for upper-division undergraduates.
Descriptors: Spectroscopy, Science Instruction, College Science, Undergraduate Study, Biochemistry, Science Laboratories, Laboratory Experiments, Science Experiments, Molecular Structure, Teaching Methods, Scientific Concepts
Division of Chemical Education, Inc and ACS Publications Division of the American Chemical Society. 1155 Sixteenth Street NW, Washington, DC 20036. Tel: 800-227-5558; Tel: 202-872-4600; e-mail: email@example.com; Web site: http://pubs.acs.org/jchemeduc
Publication Type: Journal Articles; Reports - Descriptive; Guides - Classroom - Teacher
Education Level: Higher Education; Postsecondary Education
Authoring Institution: N/A