(a) galactose dehydrogenase (b) GDP–mannose-3,5-epimerase (c) phosphoglucose isomerase (d) phosphomannose isomerase (e) phosphomannose mutase 2 D-glucose-6-phosphate → D-fructose-6-phosphate D-mannose-6-phosphate - GDP- D-mannose → GDP-L-galactose 3 4 D-mannose-1-phosphate 5 7 L-galactose-1-phosphate L-galactose - 9 L-galactono-1,4-lactone L-ascorbic acid
(a) galactose dehydrogenase (b) GDP–mannose-3,5-epimerase (c) phosphoglucose isomerase (d) phosphomannose isomerase (e) phosphomannose mutase 2 D-glucose-6-phosphate → D-fructose-6-phosphate D-mannose-6-phosphate - GDP- D-mannose → GDP-L-galactose 3 4 D-mannose-1-phosphate 5 7 L-galactose-1-phosphate L-galactose - 9 L-galactono-1,4-lactone L-ascorbic acid
Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
Section: Chapter Questions
Problem 1P
Related questions
Question
A proposed pathway for ascorbic acid (vitamin C) biosynthesis in plants takes the form (see pic 1). Match each of the following enzymes to one of the pathway steps.

Transcribed Image Text:(a) galactose dehydrogenase
(b) GDP–mannose-3,5-epimerase
(c) phosphoglucose isomerase
(d) phosphomannose isomerase
(e) phosphomannose mutase

Transcribed Image Text:2
D-glucose-6-phosphate → D-fructose-6-phosphate
D-mannose-6-phosphate -
GDP- D-mannose → GDP-L-galactose
3
4
D-mannose-1-phosphate
5
7
L-galactose-1-phosphate L-galactose -
9
L-galactono-1,4-lactone
L-ascorbic acid
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