A Clayton Struve

Insider Trading: Purchases
Company Symbol Price Amount Relationship Remaining Holdings Date Form 4
PBIO $0.53 4,000 Large Shareholder 112,585 2012-04-16 Filing
PBIO $0.60 2,000 Large Shareholder 108,585 2012-04-13 Filing
PBIO $0.55 4,000 Large Shareholder 106,585 2012-04-11 Filing
PBIO $0.55 2,000 Large Shareholder 102,585 2012-04-10 Filing