Table 1. Quantification of PNMT/Lac-Z expression in the mouse heart.

	Mean β-Gal positive pixels per five random slices		% β-Gal positive pixels per five random slices
Heart	Left	Right	Left	Right
R26R-control	0	0	N/A	N/A
R26R-Cre-1	7031±1306	965±412	87.5	12.5
R26R-Cre-2	22806±2568	1827±79	92.2	7.8
R26R-Cre-3	37763±14618	2521±304	87.9	12.1
Mean, R26R-Cre (n = 3)	22533±8873	1771±450	89.2	10.8

P-value = .0001.