Figure 6.

Effects of time controls, pyrogallol (100 μM), carboxy-PTIO (100 μM), and hydroxocobalamin (30 μM) on relaxations of rat anococcygeus muscles produced by nitrergic nerve stimulation (1 Hz for 10 s), Angeli's salt (NO⁻; 0.3 μM), NO^• (0.5 μM) and nitrosonium tetrafluoroborate (NO⁺; 100 μM) expressed as percentages of relaxations before addition of a modifying agent (or elapse of time for controls). Column heights indicate means and I-bars are s.e.means. The number of muscles contributing to each mean is indicated at the foot of each column.