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Hematoporphyrin-sensitized photodynamic inactivation of viral RNA-dependent DNA polymerase.

Visible light (6328A) was shown to inactivate RNA-dependent DNA polymerase activity of Moloney mouse leukemia virus, in the presence of hematoporphyrin. The same treatment on exogenous, template-initiation complex had no effect on enzyme activity. It was suggested that this enzyme may be the target of photodynamic inactivation of this and related viruses.