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| Date | Trading Symbol | Open | High | Low | Close | Volume |
| 11/6/2009 | PBIO | 1.6500 | 1.6500 | 1.6399 | 1.6399 | 700 |
| 10/28/2009 | PBIO | 1.5000 | 1.5750 | 1.4200 | 1.5300 | 7500 |
| 10/27/2009 | PBIO | 1.6300 | 1.6500 | 1.5000 | 1.6000 | 9700 |
| 10/26/2009 | PBIO | 1.5100 | 1.6399 | 1.5000 | 1.5500 | 2200 |
| 10/21/2009 | PBIO | 1.6000 | 1.7400 | 1.6000 | 1.6100 | 5382 |
| 10/20/2009 | PBIO | 1.6050 | 1.6050 | 1.6000 | 1.6000 | 600 |
| 10/19/2009 | PBIO | 1.7000 | 1.7000 | 1.7000 | 1.7000 | 11650 |
| 10/16/2009 | PBIO | 1.7599 | 1.7599 | 1.5760 | 1.7000 | 5850 |
| 10/15/2009 | PBIO | 1.6000 | 1.6100 | 1.5730 | 1.6000 | 26684 |
| 10/14/2009 | PBIO | 1.7000 | 1.7800 | 1.6000 | 1.6000 | 23260 |
| 10/13/2009 | PBIO | 1.7019 | 1.7199 | 1.7019 | 1.7100 | 850 |
| 10/12/2009 | PBIO | 1.6900 | 1.7001 | 1.6900 | 1.7001 | 10024 |
| 10/9/2009 | PBIO | 1.7000 | 1.7000 | 1.6899 | 1.6899 | 1500 |
| 10/8/2009 | PBIO | 1.6200 | 1.7000 | 1.6200 | 1.6200 | 16166 |
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