FIGURE 1 
SK 
1L 
MoMuLV | _J 
p p 
i i 
LTR 5'H» 
gag 
pol 
env 
SK 
_LL 
LTR 
SK 
uu 
N2 [_J 
P P 
I I 
LTR 5'4» 
NEO f 
PXEC SK 
I in' IL, 
LTR 
SAX 
LTR 5’V 
NEO r 
SV40 hADA 
LTR 
L 
JL 
X 
± 
± 
I 
X 
X 
I 
X 
X 
X 
X 
X 
X 
J 
0 0.5 1.0 1.5 20 25 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0 
SCALE IN Kb 
Scale diagram of Moloney murine leukemia virus and the N2 and SAX 
retroviral vectors. 
[ 102 ] 
Recombinant DNA Research, Volume 12 
