(A) The 35S:GFP-EVDint/ter-GUS fusion was made by introducing the EVD intron and proximal shGAG terminator (including the premature cleavage and polyadenylation site; PCAP) between the GFP and GUS coding sequence. Like EVD, it spawns full length unspliced and short spliced mRNAs. Red squares: stop codons. 