1.17.1.4	xanthine dehydrogenase	guanosine nucleotides degradation III	-	-	
2.4.2.1	purine-nucleoside phosphorylase	guanosine nucleotides degradation III	-	-	
2.4.2.15	guanosine phosphorylase	guanosine nucleotides degradation III	-	-	
3.1.3.5	5'-nucleotidase	guanosine nucleotides degradation III	-	-	
3.5.4.3	guanine deaminase	guanosine nucleotides degradation III	-	-