Abstract

l-asparaginase, an enzyme used in the treatment of acute lymphocytic leukemia, is found in the serum of only a few mammalian groups, including the guinea pig and its close relatives in the superfamily Cavioidea. This report describes the purification and characterization of l-asparaginase from guinea pig serum. Antiserum against the purified enzyme cross-reacted with sera from other Cavioidean species but not with mouse serum. Relatively weak cross-reaction with unpurified l-asparaginase in guinea pig liver indicates a significant degree of evolutionary divergence.

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