“…Expression of foreign proteins by several members of the Paramyxoviridae has been reported (Bukreyev et al, 1996;Mebatsion et al, 1996;He et al, 1997;Johnson et al, 1997;Roberts et al, 1998;Baron et al, 1999;Singh & Billeter, 1999;Bailly et al, 2000;Buchholz et al, 2000;Durbin et al, 2000;Krishnamurthy et al, 2000;Huang et al, 2001;Nakaya et al, 2001). In most of these cases, the foreign gene was inserted at a specific position in the viral genome and no systematic attempts were made to examine the effects of the position of the foreign gene on expression levels and virus replication.…”