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Heinrich-Pette-Institut für Experimentelle Virologie und Immunologie an der Universität, Hamburg, Martinistrasse 52, 2000 Hamburg 20, Federal Republic of Germany
Analysis of poliovirus-infected cells by isoelectric focusing in urea resolves at least 25 bands. Combination of isoelectric focusing and sodium dodecyl sulphate-polyacrylamide gel electrophoresis (SDS-PAGE) in a two-dimensional analysis (2D-analysis) revealed a much better resolution than each method separately. By 2D-analysis most of the bands could be correlated with the known poliovirus-specific polypeptides generated in the infected cell. With this technique it was possible to determine the apparent isoelectric point (pI) of the identified poliovirus polypeptides. They are in the range from pH 5.6 for polypeptide 7d to pH 8.8 for polypeptide X, which is the most basic found so far.
Received 12 June 1980;
accepted 6 August 1980.
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