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Science 25 July 1986:
Vol. 233. no. 4762, pp. 464 - 467
DOI: 10.1126/science.3014660
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Articles
Science, Vol 233, Issue 4762, 464-467
Copyright © 1986 by American Association for the Advancement of Science
The E5 transforming gene of bovine papillomavirus encodes a small, hydrophobic polypeptide
R Schlegel,
M Wade-Glass,
MS Rabson,
and
YC Yang
Bovine papillomavirus (BPV-1) contains two independent transforming genes that have been mapped to the E5 and E6 open reading frames (ORF's). The E5 transforming protein was identified by means of an antiserum against a synthetic peptide corresponding to the 20 COOH-terminal amino acids of the E5 ORF. The E5 polypeptide is the smallest viral transforming protein yet characterized; it had an apparent size of 7 kilodaltons. The transforming polypeptide is encoded entirely within the second half of the E5 ORF and its predicted amino acid composition is very unusual; 68% of the amino acids are strongly hydrophobic and 34% are leucine. Cell fractionation studies localized this polypeptide predominantly to cellular membranes.
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