Cell Number x 1000 
Growth Curves of CFT1 Cells Expressing 
Various Levels of CFTR 
Minus Forskolin 
Plus Forskolin 
5 
o 
coo 
eoo 
400 
200 
/ 
/ 
f 
2 3 4 
5 3 10 12 14 
COO 
eco 
Days in Culture 
Figure 21. Effect of transduced CFTR on airway cell growth. 
Recombinant DNA Research, Volume 17 
[481] 
