Chapter 18, Problem 18.112EP

(a)

Interpretation Introduction

Interpretation: The structure for $\alpha$-D-Galactose 6-phosphate has to be drawn.

Concept introduction: The reaction of hydroxyl groups of a monosaccharide with inorganic oxyacids results in the formation of inorganic esters.  Phosphoric acid gives phosphate esters.  Phosphate esters are commonly found in biological systems.  The esterification of hemiacetal group on carbon 1 and the primary alcohol on carbon 6 gives phosphate esters.

(b)

Interpretation Introduction

Interpretation: The structure for $\beta$-D-Galactose 1-phosphate has to be drawn.

Concept introduction: The reaction of hydroxyl groups of a monosaccharide with inorganic oxyacids results in the formation of inorganic esters.  Phosphoric acid gives phosphate esters.  Phosphate esters are commonly found in biological systems.  The esterification of hemiacetal group on carbon 1 and the primary alcohol on carbon 6 gives phosphate esters.