Polyoma virus middle T is essential for virus replication and persistence as well as for tumor induction in mice.

Abstract excerpt

A mutant strain of polyoma virus encoding a truncated middle T protein has been studied for its ability to replicate and induce tumors following inoculation into newborn mice. Virus replication in the acute period prior to expected onset of tumors as well as persistence of virus in older animals were followed. The mutant virus proved to be defective in replication and persistence and failed to induce tumors....

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