Table 1 Additional functional data, not included in Figure 1.

1.5

3 ± 2

19.9 ± 0.8

2.2 ±0.1

0.029 ± 0.002

353 ± 60^*

2.0

3 ± 3

23.3 ± 1.9

2.0 ± 0.3^*

0.029 ± 0.002

375 ± 17†

2.5

5 ± 4

20.2 ± 0.6

2.3 ± 0.2†

0.025 ± 0.002

346 ± 93^*

3.5

4 ± 4

20.4 ± 0.9

2.1 ± 0.2

0.025 ± 0.001

532 ± 53

3.5+Chelerythrine

2 ± 1

20.7 ± 1.6

2.2 ± 0.4

0.027 ± 0.001

369 ± 46^*

Dobutamine

3 ± 3

23.3 ± 1.9

1.8 ± 0.2

0.029 ± 0.002

587 ± 41