Polyomavirus middle T protein encoded by a retrovirus transforms nonestablished chicken embryo cells.

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RESUMO

A murine retrovirus encoding the middle T protein of polyomavirus infected and transformed nonestablished chicken embryo cells. The infected cultures formed colonies in soft agar-containing medium and released infectious transforming virus. Middle T protein expressed in the transformed chicken cells associated with p60c-src and, in immunoprecipitates, enhanced the tyrosine protein kinase activity of p60c-src.

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