Abstract
The epitopes recognized by 41 monoclonal antibodies directed against the nucleocapsid protein (NP) of human parainfluenza virus type 2 (hPIV-2) were mapped on the primary structure of the hPIV-2 NP protein by testing their reactivities with deletion mutants. By Western immunoblotting using these monoclonal antibodies, the analysis of deletion mutants of the hPIV-2 NP protein was performed to identify the region essential for NP-NP interaction and phosphoprotein (P)-binding sites on the NP protein. The results indicate that the N-terminal 294 aa of the NP protein are all required for NP-NP self-assembly, and that two C-terminal parts of the NP protein are essential for NP-P binding: one region, aa 295-402, is required for binding to the C-terminal part of the P protein and another region, aa 403-494, to the N-terminal part of the P protein.
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