THE N2 FAMILY OF RETROVIRAL VECTORS 
O 
CD 
Recombinant DNA Research, Volume 12 
ID 
ID 
O 
ID 
ID 
O 
LD 
CO 
O 
00 
LD 
CN 
O 
csi 
LD 
o 
LD 
O 
o 
[ 203 ] 
SCALE IN Kb 
