Lehninger Principles of Biochemistry 6th Edition

Published by W.H. Freeman
ISBN 10: 1-42923-414-8
ISBN 13: 978-1-42923-414-6

Chapter 7 - Carbohydrates and Glycobiology - Problems - Page 278: 5

Answer

Fructose cyclizes to either the pyranose or the furanose structure. Increasing the temperature shifts the equilibrium in the direction of the furanose, the less sweet form.

Work Step by Step

The $beta$-D-furanose form of fructose is much less sweet.
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