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. 1988 Feb;62(2):586-93.
doi: 10.1128/JVI.62.2.586-593.1988.

Strain variation and nuclear association of Newcastle disease virus matrix protein

K S Faaberg  1 , M E Peeples
Affiliations

Strain variation and nuclear association of Newcastle disease virus matrix protein

K S Faaberg et al. J Virol. 1988 Feb.

Abstract

Five monoclonal antibodies to the matrix (M) protein of Newcastle disease virus (NDV) Australia-Victoria (AV) strain were generated and characterized. In competitive antibody-binding assays, the antibodies fell into three discrete groups. The antigenic sites described by these antibody groups were designated M1, M2, and M3. Each antibody reacted with a panel of NDV strains in a manner unique to its group, confirming the grouping by competitive antibody binding. Only site M1 was found on all 12 of the strains tested and may be a "pan-NDV" epitope. A large portion of the M protein of strain AV was detected in the nuclei of infected cells by all five monoclonal antibodies. In addition, the antibodies only stained the nuclei of cells infected with NDV strains expressing M protein containing the corresponding antigenic site. These results confirm that the immunoreactivity in the nucleus is actually caused by the M protein and not by a cross-reacting host protein induced by viral infection.

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