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CASE FILES: BIOCHEMISTRY
AMP
NH
GMP
IMP
j^ Pi
A d e n o s in e -^
AD A
Guanosine
Inosine
R-1-P
R-1-P
Guanine
Hypoxanthine
xanthine oxidase
Allopurinol
Xanthine
xanthine oxidase
2V 2
Urate
Figure 43-1. Purine catabolic pathway. The enzyme steps inhibited by allop-
urinol are indicated.
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