CONFIDENTIAL TREATMENT EXHIBIT 2.1 PORTIONS OF THIS EXHIBIT HAVE BEEN OMITTED AND FILED SEPARATELY WITH THE SECRETARY OF THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO REGISTRANT'S APPLICATION OBJECTING TO DISCLOSURE AND REQUESTING CONFIDENTIAL...Stock and Asset Purchase Agreement • December 2nd, 1998 • Centocor Inc • In vitro & in vivo diagnostic substances • Pennsylvania
