Cell density 10⁴ cells/mlpmol/10⁷cells

cGMP_in

cGMP_ex/in

Baseline

61 ± 3.2

3.4 ± 0.4

2.5 ± 0.5

cGMP

57 ± 3.6

242 ± 23

61 ± 5.4

IBMX

35 ± 3.6

8.1 ± 1.0

13 ± 1.6

cGMP

9.2 ±1.9

480 ± 17

88 ± 14