1887

Abstract

SUMMARY

The induction of a type C virus from a strain of human embryonic lung cells (HEL-12) by iododeoxyuridine (IdUrd) was examined at various times during propagation. IdUrd did not elicit type C virus production immediately following initiation of cultures from frozen primary HEL-12 cells. After overnight treatment with 30 µg/ml IdUrd the cells expressed viral antigens and produced a type C virus between the 25th and 80th day of growth. Production of the induced type C virus was transient. Single-cell clones of the parental HEL-12 strain were likewise susceptible to type C virus production by IdUrd. The ability of IdUrd to induce virus terminated with the onset of spontaneous type C virus production from HEL-12 cells at between 80 and 120 days of growth.

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/content/journal/jgv/10.1099/0022-1317-42-2-399
1979-02-01
2021-10-25
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