Fig. 9From: Karyotype alteration generates the neoplastic phenotypes of SV40-infected human and rodent cellsFocus of transformed cells from a culture of rat lung cells three weeks after infection with SV40. This focus was one of 108 that arose in confluent secondary cultures of rat lung cells three weeks after infection of a primary culture with SV40 virus. The micrograph was taken at 120X magnification. Details of preparing the culture are described in the textBack to article page