[Partial purification and characterization of thymidine phosphorylase in human platelets]

An enzyme which catalyzes the phosphorolytic cleavage of thymidine, and whose behaviour is characteristic of thymidine phosphorylase, was purified 130 times from human blood platelets. The results obtained by chromatography and electrophoresis, enable us to consider the existence of a dimeric form of this enzyme.