Table 1.

Effects of CTX plus Apa on relaxation of MCA to NaHS or L-Cys, and role of vascular endothelium in L-Cys-induced relaxation in the MCA (Mean ± SD, n = 8).

Group	Maximum possible effect (%)
Vehicle	8.03 ± 1.1
NaHS	76.23 ± 7.4**
NaHS+ CTX+Apa	8.75 ± 1.7*
L-Cys(+Endo)	79.28 ± 5.4**
L-Cys(-Endo)	8.85 ± 3.8##
L-Cys +Apa +CTX	9.7 ± 2.0##

^**P < 0.01 vs. vehicle;

^*P < 0.01 vs. NaHS;

^##P < 0.01 vs. L-Cys (+Endo).