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The gene encoding the phosphoprotein of the vaccine strain of Peste des petits ruminants (PPR) virus (Nigeria 75/1 vaccine strain) has been cloned and its nucleotide sequence been determined. This gene is 1655 nucleotides long and encodes two overlapping open reading frames (ORFs). Translation from the first AUG would produce a polypeptide of 509 amino acid residues with a predicted molecular mass...