Millions of investment dollars are flowing to Pennsylvania Biotechnology Center, including a $5 million pledge from Bucks County Employees’ Retirement Board. Leaders of the Buckingham biotech center, a nonprofit life sciences incubator, announced the pledge Wednesday. They said they were grateful local government leaders chose to invest in the Hatch Biofund, created two years ago to fund life science innovations through seed-stage member companies. The Hatch Biofund Management team is working to raise $50 million to support companies that are members of the biotech center. The $5 million investment by the Bucks County Employees’ Retirement Board follows a $10 million commitment made two months ago by Daiichi Sankyo, one of the largest pharmaceutical companies in Japan with U.S. headquarters in Basking Ridge, New Jersey.