FIG. 1.

Schematic presentation of proteins encoded by the two genomic segments of IPNV. Segment A contains two partially overlapping open reading frames encoding the polyprotein (pVP2-VP4-VP3) and the smaller VP5 protein. Segment B encodes VP1, the RNA-dependent polymerase. Sequences of primers used for generating the different cloned constructs are listed in Table 1. Positions of the first and the last amino acids encoded by each cloned fragment are indicated next to the PCR primers (arrows).