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Chapter 23 769
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32.
HN
N
O
O
H T O
T
HN
N
O
O
H
T
O
T
−
+
HN
N
O
O
T
H O
T
ribose-5
'
-phosphate
ribose-5
'
-phosphate
ribose-5
'
-phosphate
33.
For clarity, the substituents are not put on the three bonds attached to the pyridinium ring in Problems
33–36. Each reaction in Problems 33–35 starts after the amino acid has undergone transimination with the
lysine-bound coenzyme.
C
O
O
_
N
C CH
2
HO
H
HC
HC
HC
B
N
C CH
2
HO
N
C CH
2
C
NH
2
CH
2
CH
E
(CH
2
)
4
N
+
HO
_
CH
3
NH
O
_
enzyme catalyzed
reaction
HB
+
+ NH
4
+
N
H
+
N
H
N
H
+
N
H
+
C
O
O
_
C
O
O
_
transimination
E
(CH
2
)
4
NH
2
HCl
H
2
O
imine
hydrolysis
C
O
O
_
C
C
O
CH
3
O
O
_
C
C
O
nonenzyme
catalyzed reaction
enzyme catalyzed
reaction
tautomerization