Table 3.

ADPR cyclase activity measured with NGD substrate in membrane fraction and in supernatant of homogenates (30,000 × g per 1 h) from uteri of control and E₂-treated rats

	n	Control	E2 treated
Membrane fraction	3	0.52  ±  0.02*	1.76  ±  0.01*†
Supernatant	3	0.15  ±  0.03	0.25  ±  0.02

Values denote mean ± SEM of ADPR cyclase activity (nmol cGDPR per min per mg protein) from n = 3 experiments. 

^*Significantly different from cytosol (P < 0.01, t test). 

^†Significantly different from controls (P < 0.01, t test).