Figure 1From: Current situation and future direction of Newcastle disease vaccinesSchematic illustration of NDV particle and genome structure. A Illustration of the structure of NDV particles. HN, haemagglutinin-neuraminidase; F, fusion protein; M, matrix protein; RNP, ribonucleotide-protein complex. B Schematic representation of the structure of the NDV genome. The red arrow indicates the cleavage site of the F protein. The representative amino acid motifs of the virulent- and avirulent-type cleavage sites are shown.Back to article page