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. 1978 Jun;75(6):2694–2698. doi: 10.1073/pnas.75.6.2694

The "sarcoma-specific" region of Moloney murine sarcoma virus 124.

D Dina
PMCID: PMC392629  PMID: 208071

Abstract

Labeled, purified 30S RNA from Moloney murine sarcoma virus was annealed to an excess of Moloney murine leukemia virus complementary DNA. Upon treatment of the resulting DNA.RNA hybrids with RNase H followed by sucrose gradient sedimentation, and undigested 18S RNA molecule was recovered. This RNA molecule was shown to represent the "sarcoma-specific" region of the virus. The unintegrated linear DNA provirus of murine sarcoma virus 124 was isolated from newly infected cells and a physical map of the sarcoma-specific region was obtained. First, unintegrated full-length linear proviral DNA molecules were cleaved by several restriction endonucleases. The reciprocal position and orientation with respect to the viral RNA of the resulting fragments were established. The location of the sarcoma-specific region was determined by competition-hybridization with 125I-labeled viral genomic RNAs and proviral DNA fragments. A 1500-base-pair fragment was obtained by cleavage with HindIII + Bgl II. This fragment mapped between 750 and 2250 base pairs from the right end of the proviral DNA (corresponding th the 3' terminus of the viral RNA) and contained the whole set of the sarcoma-specific information. This murine sarcoma virus proviral restriction fragment is approximately of the same size and map position as the isolated 18S sarcoma-specific RNA.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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