1 Exhibit 4.3 NEORX CORPORATION SHARE PURCHASE AGREEMENT SHARE PURCHASE AGREEMENT, dated as of August 23, 2000, between NeoRx Corporation, a Washington corporation (the "Company"), and the purchaser listed on Schedule A attached hereto (the...Share Purchase Agreement • September 8th, 2000 • Neorx Corp • In vitro & in vivo diagnostic substances • Washington
