Putative T7 promoter-derived transcript transcribed either in vivo or in vitro in BHK-21 cells infected by
recombinant vaccinia virus vTF7-3 containing 5'-EMCV-R_IRES-CAT-EMCV_type_R_IRES_eGFP-3'.
Maybe shorter version of eGFP is translated as well (2073-2645) but this has not been explicitly tested. But
in vitro RRL-based experiments show some shorter protein products (Figs. 5 and 6).