Xanthosine monophosphate aminase

The conversion of the adenine ring to guanine takes place by the deamination of AMP to inosine monophosphate (IMP), followed by oxidation of IMP to xanthosine monophosphate (XMP) and amination of XMP to GMP. Bacterial mutants which lack either the dehydrogenase or the aminase cannot convert adenine to nucleic acid guanine (19,20). In general the interconversion of purines does not take place by reversible reactions operating in either direction. 

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See also in sourсe #XX -- [ , , ]

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