Figure 2.

The effect of temperature on the degradation of ATP. EFS (8 Hz, 25 s) was applied to the superfused guinea-pig vas deferens and the superfusate collected. The ability of superfusate samples to degrade exogenous ATP (100 nM) at 37°C and 20°C was then compared. Each point is the mean of four measurements. Vertical bars indicate s.e.mean.