1887

Abstract

SUMMARY

Large and small plaque variants of A foot-and-mouth disease virus were shown to have specific antigenic determinants. Large plaque virus antigenic specificity was destroyed by trypsin treatment, but the small plaque antigen was resistant despite cleavage of the trypsin-sensitive polypeptide. The cleavage of polypeptide VP by trypsin resulted in the formation of a new antigen not present on untreated virus. The effects of chymotrypsin and trypsin on the polypeptides of the plaque variants have been examined and related to changes in antigenicity, infectivity, and exposure of the polypeptides at the surface of the capsid. The results are discussed in relation to the orientation of the trypsin-sensitive polypeptide in the virus capsid.

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1978-12-01
2022-01-27
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