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. 1976 Mar;17(3):935–949. doi: 10.1128/jvi.17.3.935-949.1976

Proteins of Epstein-Barr virus. I. Analysis of the polypeptides of purified enveloped Epstein-Barr virus.

M Dolyniuk, R Pritchett, E Kieff
PMCID: PMC515494  PMID: 176452

Abstract

Epstein-Barr virus (EBV) was purified from the extracellular fluid of HR-1 and B95-8 cell lines. The preparations of purified virus consisted of enveloped particles and had EBV-specific antigneic reactivity. Comparison of the amount of labeled protein in preparations of virus purified from cultures incubated in [35S]methionine with the amount of labeled protein in preparations obtained following a mixture of unlabeled virus with [35S]methionine-labeled cellular proteins indicated that less than 2% of the labeled protein in the purified virus preparation could be attributed to contamination with labeled cellular proteins. No extraneous membranous material was seen in thin sections of the purified virus preparations. Analysis of the polypeptides of purified enveloped EBV indicated the following. (i) Eighteen polypeptides could be resolved in Coomassie brilliant blue-stained electropherograms of extracellular virus purified from HR-1 and B95-8 cultures. (ii) Thirty-three polypeptides could be resolved in fluorograms of labeled EBV purified from B95-8 cultures and subjected to electrophoresis in acrylamide gels cross-linked with diallyltartardiamide. The molecular weight of the EBV polypeptides was estimated by co-electrophoresis with the polypeptides of purified herpes simplex virus and purified polypeptides of known molecular weight to range from 28 x 10(3) to approximately 290 x 10(3) (iii) The polypeptides of EBV could be grouped by their relative molar abundancy into three classes: VP6, 7, and 27 present in high abundance; VP1, 12, 20, 23, and 29 present in moderate abundance; and a third class of less abundant polypeptides, VP4, 5, 8, 9, 10, 11, 15, 16, 21, and 22. The remainder of the polypeptides could not be precisely quantitated. (iv) The polypeptides of purified EBV, although similar in number and in range of molecular weight to the polypeptides of purified herpes simplex virus, differ sufficiently from those of herpes simplex virus so as to preclude comparison of individual polypeptide components.

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Selected References

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