1887

Abstract

Summary

A Rauscher virus (RV)-transformed erythroid cell line, RA-1, was shown to be a non-producer cell line. RA-1 cells express not only gp51–54 -related glycoprotein, but also gp70, which is more closely related to gp51–54 coded by a recombinant gene than to the MuLV-R gp70. RA-1 cells could be infected by Friend, Moloney and Gross viruses, but not by the homologous Rauscher murine leukaemia virus. Rescue of spleen focus-forming activity was obtained on infection of these cells with MuLV-F or MuLV-Mol, but not with MuLV-Gross. The RNA of the RV complex resembles closely that of Friend virus (FV). It contains a 32S, presumably defective, genome, which most likely is responsible for spleen focus formation, and a 35S helper virus genome. Oligonucleotide fingerprint data suggest that RV has evolved independently of FV. Erythroid early BFU-E cells of mice infected with RV of Friend helper virus-infected RA-1 cells were shown to require no addition of conditioned medium to form large erythroid colonies (BFU-E) in the presence of only small amounts of erythropoietin.

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/content/journal/jgv/10.1099/0022-1317-63-1-45
1982-11-01
2019-11-17
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http://instance.metastore.ingenta.com/content/journal/jgv/10.1099/0022-1317-63-1-45
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