Table 1.

Immunocytochemical analysis of 3-NO₂-tyrosination in cardiac myocytes

Treatment	Mean Intensity ± SE* (Average Pixel Value)	Percentage of ONOO− Fluorescence After Subtracting Buffer
ONOO−	2,316 ± 156	100
20 µM L-Arg	1,756 ± 110	72 ± 8
100 µM L-Arg	870 ± 58	27 ± 4
2 mM L-Arg	524 ± 58	10 ± 3
20 µM L-Arg + 1 mM NO2-Tyr	386 ± 25	3 ± 2†
20 µM L-Arg + 1 mM l-NAME	397 ± 30	3 ± 2‡
Langendorff buffer	330 ± 28	0

^*n = 10 myocytes for each treatment condition. †,‡Not significantly different from zero.