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| Date | Trading Symbol | Open | High | Low | Close | Volume |
| 11/19/2009 | PBIO | 1.6500 | 1.6500 | 1.5300 | 1.5800 | 8576 |
| 11/18/2009 | PBIO | 1.4300 | 1.8000 | 1.4300 | 1.6600 | 17092 |
| 11/17/2009 | PBIO | 1.5100 | 1.5300 | 1.4300 | 1.4335 | 4979 |
| 11/16/2009 | PBIO | 1.6900 | 1.6900 | 1.4301 | 1.4500 | 12295 |
| 11/12/2009 | PBIO | 1.6000 | 1.6400 | 1.6000 | 1.6000 | 3000 |
| 11/11/2009 | PBIO | 1.4500 | 1.6805 | 1.4500 | 1.6805 | 795 |
| 11/10/2009 | PBIO | 1.6800 | 1.6800 | 1.4500 | 1.6800 | 1600 |
| 11/9/2009 | PBIO | 1.5000 | 1.6800 | 1.4450 | 1.6800 | 7800 |
| 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 |
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