TABLE 1.

Virus strains used in this study

Virus	Description	Reference
PRV Becker	Wild type; parental strain	Laboratory strain
PRV 813	Us3 null; Us3ns; nonsense mutation	This work
PRV 813R	Revertant of PRV 813; Us3R	This work
PRV 180	PRV Becker expressing mRFP-VP26, red fluorescent capsid; (red-capsid virus)	12
PRV 823	Recombinant between PRV 813 and PRV 180; Us3 null virus expressing mRFP-VP26 (red capsid/Us3 null)	This work
PRV 182	PRV Becker expressing mRFP-VP26 and eGFP-VP22; red fluorescent capsid; green tegument protein; (dual-color virus)	12
PRV 833	Recombinant between PRV 813 and PRV 182; Us3 null virus expressing mRFP-VP26 and eGFP-VP22; (dual-color Us3 null virus)	This work