Control medium | Control medium | Control medium | Control medium |
10 μmDA1-a | 10 μmDA | 10 μm DA | 10 μm DA |
1 μm DA | 1 μmQuinpirole1-b | 10 μm DA and 1 μm eticlopride1-c | 10 μm DA and 1 μm MK 8011-d |
Ascorbic acid1-e | 1 μm SK&F 383931-f | 10 μm DA and 1 μm SCH233901-g | 1 μmMK 801 |
| | 10 μm DA and 1 μm SCH23390 and 1 μm eticlopride | 100 μm AP51-h |