Abstract
Some enzymes of purine salvage were detected in the cell-free preparations from bloodstream forms of African trypanosomes: Trypanosoma vivax: T. brucei and T. congolense. Extracts of trypanosomes cleave adenosine and inosine hydrolytically except in T. congolense where adenosine cleavage was mediated by a phosphorylase. All the trypanosomes apparently lacked adenosine deaminase. Adenine aminohydrolase was found only in T. vivax while adenosine monophosphate deaminase was detected in T. brucei and T. congolense. There was no detectable adenosine kinase activity in T. brucei. A pathway is proposed for the metabolism of purines in these trypanosomes.
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