TABLE 1.

Specific transient expression of various rodent pro-α1(I) collagen promoter-CAT constructs in Rat-1, v-fos-transformed 1302-4-1, and revertant EMS-1-19 cell lines

Construct	Promoter activitya (pg of CAT/plasmid copy no. [107])
	Rat-1	v-fos transformants	Revertant
pColCAT3.5b	0.7 ± 0.2	NDd	ND
pColCAT2.3c	9.8 ± 0.5	1.7 ± 0.2	5.0 ± 0.3
pColCAT0.9b	4.7 ± 0.4	1.0 ± 0.2	2.3 ± 0.2
pColCAT0.2c	18.1 ± 2.5	3.2 ± 0.3	21.2 ± 3.6

^aData are directly related to the samples used for Fig. 4. Transfected DNA and CAT enzyme determinations are described in Materials and Methods. Data are expressed as mean ± standard error of the mean for three determinations. 

^bRat promoter. 

^cMouse promoter. 

^dND, not detected.